Mechagon, Healer Guide
Posted 11 months ago for patch 8.3 by Preston.
This page covers healer-focused strategies for the Operation: Mechagon dungeon. While it's tailored for healers, other roles may also find the information useful. If you have any suggestions or feedback, you can leave a comment below or tweet @PrestonDvorak.
This guide has been updated and maintained based on my own experiences as well as Dungeon Journal information. I'll continue to update it as-needed.
Bosses
Below are guides for the bosses in Operation: Mechagon, including their abilities, healer notes, and addon settings.
King Gobbamak
- During
Rumble, avoid the impact locations of 
Cave In.
- All players take moderate damage over time for the duration of Rumble.
- All players take moderate damage over time for the duration of
- At 100% Energy, stand within 8-yards of the tank to split the damage dealt by
Charged Smash.
- All players hit will be affected by
Electrical Charge, taking light damage over time and dealing damage to players within 6-yards.
- While affected, move near a Stolen Tech (detailed below) to activate it and remove the debuff.
- All players hit will be affected by
- Periodically summons Scrapbone Grunters from the nearby cave and the ceiling.
- These target random players with
Rampaging.
- These target random players with
- Stolen Tech
- Activating Stolen Tech with Electrical Charge helps keep the Scrapbone Grunters under control.
- Stolen Scrapbot
- Spins around the area
Thrashing Grunters.
- Spins around the area
- Stolen Shock Coil
Zaps nearby Grunters.
- Activating Stolen Tech with
Healing Notes
- Pre-heal before and use Cooldowns on Rumble.
Debuffs to Track
- Minor: Electrical Charge
Addons
Healer DBM Settings for King Gobbamak
Gunker
- The tank should always stay in melee range of Gunker to avoid
Sludge Bolt being cast. - Most of Gunker's abilities leave
Toxic Goop behind.
- Touching Toxic Goop applies
Gooped (dispel, disease), incapacitating the affected player and dealing light damage over time.
- Gooped must be destroyed by other players or dispelled to free the trapped player.
- Touching
- Squirt Bots roam the area, cleansing Toxic Goop within 5-yards of themselves with
Sanitizing Spray.
- These can also be affected by Gooped (dispel, disease) and should be freed whenever possible.
- These can also be affected by
Toxic Fumes deals light damage over time to all players for the duration of the encounter.- During
Toxic Wave, stand inside a Squirt Bot's Sanitizing Spray to avoid the wave. - Avoid the impact locations of
Splatter.
- This will always apply Gooped (dispel, disease) to one Squirt Bot.
- This will always apply
Coalesce pulls all players and Toxic Goop towards Gunker.
Healing Notes
- Be aware of players that are Gooped (dispel, disease) to heal or dispel them.
Debuffs to Track
- Major: Gooped (dispel, disease)
Addons
Healer DBM Settings for Gunker
Trixie and Naeno
This encounter consists of two enemies that do not share a health pool.
- Trixie "The Tech" Tazer
- Periodically moves to a new location with
Electric Slide. - Interrupt
Taze to prevent damage on random players. - When targeted by
Mega Taze, stand in a 
Smoke Cloud to prevent the damage over time. - Periodically
Jump Starts Naeno's Mechacycle. - Upon death, buffs Naeno with
Turob Boost causing his attacks to deal moderate damage to all players.
- Periodically moves to a new location with
- Naeno Megacrash
- Don't be in front of the boss when he casts
Bolt Buster. - Avoid the impact location of
Roadkill. - While piloting the Mechacycle:
- Avoid Naeno's path during
Pedal to the Metal. - Avoid Naeno during
Burnout.
- This leaves behind a Smoke Cloud.
- This leaves behind a
- Avoid Naeno's path during
- Upon death, buffs Trixie with
Super Boost, increasing her haste by 100%.
- Don't be in front of the boss when he casts
Healing Notes
- Players targeted by Mega Taze will take critical damage over time if they fail to make it to a Smoke Cloud.
Debuffs to Track
Addons
Healer DBM Settings for Trixie and Naeno
HK-8 Aerial Suppression Unit
This encounter alternates between stages until HK-8 is killed.
Stage One - Fire At Will!
This stage begins the encounter and restarts after the Overcharge Station has been hacked. The stage ends when the Tank Buster MK1 is killed.
- HK-8 is not attackable during this stage.
- Players must stay within the blue circle to avoid
Anti-Tresspassing Teleport. - Avoid the impact locations of
Cannon Blast. - The
Reinforcement Relay periodically warps in reinforcements.
- Tank Buster MK1
- Only one of these spawns over the duration of the stage.
- The tank will be dealing with
Wreck. - Targets random players with
Fulminating Zap, dealing moderate damage over time.
- Walkie Shockie X1
- Spawn in groups of three.
- Can be crowd-controlled.
- Stay at least 5-yards away from these to avoid damage from
Static Discharge.
- Avoid the
Clinging Static fields left behind.
- Avoid the
- At 0% Energy, stay at least 6-yards away from these to avoid the fatal damage from
Self-Destruct.
- Tank Buster MK1
Stage Two - Annihilation!
This stage begins and restarts when the Tank Buster MK1 is killed and ends when the Overcharge Station reaches 0% Energy.
- Leave the center area to avoid fatal damage from
Annihilation Blast. - One of two Overcharge Stations becomes active, either one up the path to the north, or one up the path to the south-east.
- There is a gauntlet players must pass to reach the Station.
- Avoid the wire mesh Vent Blast areas on the circular platforms to avoid being stunned.
- Avoid the Sentry Array beams as they rotate around the circular platforms, players hit will be teleported by Anti-Tresspassing Teleport.
- Avoid the Sentry Bots as they move down the pathways, players hit will be teleported by Anti-Tresspassing Teleport.
- Upon reaching the Overcharge Station, click on it to begin
Hacking.
- When the Station reaches 0% Energy, HK-8 goes
Haywire in the center area and takes 200% increased damage. - Failing to Hack the Station in 1.5-minutes will cause Annihilation Blast to deal fatal damage to all players.
- When the Station reaches 0% Energy, HK-8 goes
Healing Notes
- The tank will need additional healing or an external defensive cooldown when affected by Wreck.
- Players targeted by Fulminating Zap will need moderate healing over time.
Debuffs to Track
- Major: Fulminating Zap, Wreck
- Minor: Vent Blast
Addons
Healer DBM Settings for HK-8 Aerial Suppression Unit
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Tussle Tonks
- The Platinum Pummeler
- Protected by 3-stacks of
Platinum Plating, reducing damage taken by 33% per stack.
- Stacks can be removed using the
Piston Smashers around the arena.
- Stacks can be removed using the
- During
Whirling Edge, stay at least 5-yards away from the boss to avoid the heavy damage. - Avoid the mines laid by
Lay Mine.
- Protected by 3-stacks of
- Gnomercy 4.U.
- Charges random players with
Foe Flipper, launching all players within 6-yards into the air. - During
Vent Jets, don't stand in front of the boss.
- All players will be taking moderate damage over time.
- Targets random players with Maximum Thrust, knocking back all players in its path.
- When possible, aim this towards the arena wall to stun the boss.
- Charges random players with
- Tussle Tonk Arena
- Stay at least 4-yards away from Piston Smashers to avoid the extra damage and stun.
- Avoid the grid-like crevices in the arena floor as
Buzz Saws will randomly move through them, knocking back players hit.
- Stay at least 4-yards away from
Healing Notes
- Position yourself away from the boss before Vent Jets to minimize the chance having to move will interrupt your healing.
Debuffs to Track
- There are no particular debuffs to track.
Addons
Healer DBM Settings for Tussle Tonks
K.U.-J.0.
- The tank will steadily gain stacks of
Blazing Chomp (dispel, magic).
- When dispelled, this deals damage to all players based on the number of stacks.
- This can generally be dispelled as soon as it's applied because it stacks very slowly.
- Avoid the impact locations of
Air Drops.
- The resulting
Junk Bombs will explode when hit by 
Explosive Leap or 
Venting Flames.
- The resulting
- When targeted by Explosive Leap, move at least 8-yards away from other players and Junk Bombs.
- During Venting Flames, break line of sight on the boss using Air Drop boxes to prevent the critical damage dealt.
Healing Notes
- Be sure all players are topped off before dispelling Blazing Chomp (magic).
Debuffs to Track
- Major: Blazing Chomp (dispel, magic)
- Minor: Explosive Leap
Addons
Healer DBM Settings for K.U.-J.0.
Machinist's Garden
- Head Machinist Sparkflux
- Avoid the impact locations of
Discom-BOMB-ulator (dispel, magic).
- Avoid the impact locations of
- Garden Gadgets
- Avoid the fire from
Hidden Flame Cannons that rotate around the column in the center of the room. - Avoid the Self-Trimming Hedge blades bouncing around the area.
- Inconspicuous Plant
- These should be killed quickly.
- Targets random players with
Blossom Blast, dealing light damage over time. - Upon death, releases an
Oil Fountain.
- If this contacts fire from a Hidden Flame Cannon, avoid the impact locations of
Roaring Flame.
- If this contacts fire from a
- Avoid the fire from
Healing Notes
- This fight can become hectic with all the mechanics that need to be dodged, be aware of players that end up out of range or line of sight.
Debuffs to Track
- Major: Discom-BOMB-ulator
- Minor: Blossom Blast
Addons
Healer DBM Settings for Machinist's Garden
King Mechagon
Stage One - Aerial Unit R-21/X
- The tank will be dealing with Pulse Blast.
- Avoid the
Plasma Orbs scattered around the area.
- Avoid the impact locations and the Orb's paths during Recalibrate.
- Avoid the impact locations and the Orb's paths during
- Avoid the space between Mechagon and the player targeted by
Giga-Zap, players hit take moderate damage and then moderate damage over time. - During
Take Off!, stay at least 8-yards away from Mechagon.
- Once in the air,
Cutting Beam deals heavy damage to any players beneath Mechagon as well as light damage over its duration to all players.
- Once in the air,
Stage Two - Omega Buster
- Plasma Orbs and Recalibrate continue in this stage.
- Giga-Zap now targets three players one after the other and affects a larger area.
- The tank should always stay in melee range of Mechagon to prevent
Protocol: Ninety-Nine from dealing heavy damage to all players. - Run away from the location of the
Magneto-Arm to reduce damage taken.
Healing Notes
- Use cooldowns as needed during Cutting Beam.
- Use cooldowns during Magneto-Arm.
Debuffs to Track
- Minor: Giga-Zap
Addons
Healer DBM Settings for King Mechagon
Trash Mobs
Below are notes for the trash mobs in Operation: Mechagon. Operation: Mechagon has an open layout to begin the instance, followed by a linear layout. Early trash is grouped by the boss it's near while later trash is ordered as if you're completing the bosses as they're listed above.
King Gobbamak Area
- Scrapbone Shaman
- Interrupt Stoneskin to prevent the reduced damage taken.
- Dispel
Grasping Hex (curse) to remove the damage over time and root effect.
- Interrupt
- Scrapbone Grinder
- Dispel
Enrage (enrage).
- Dispel
- Scrapbone Bully
- Malfunctioning Scrapbot
Exhaust clouds obscure vision into and out of the cloud.- Stay at least 5-yards away during
Gyro-Scrap to avoid the heavy damage over time. - Stay at least 8-yards away when
Self-Destruct Protocol is cast to avoid the fatal damage.
Trixie and Naeno Area
- This area includes Malfunctioning Scrapbots, detailed above.
- Heavy Scrapbot
- Exhaust clouds obscure vision into and out of the cloud.
- Stay at least 5-yards away during Gyro-Scrap to avoid the heavy damage over time.
- Interrupt
Repair Protocol to prevent the healing.
- Walkie Shockie X1
- Stay at least 5-yards away to avoid damage from Static Discharge and avoid the Clinging Static it leaves behind.
- At 0% Energy, stay at least 6-yards away to avoid the heavy damage from Self-Destruct.
- Stay at least 5-yards away to avoid damage from
- Pistonhead Scrapper
- Applies stacks of
Sledgehammer to the tank, reducing armor by 10% per stack.
- Applies stacks of
- Pistonhead Blaster
- Avoid the impact locations of
Scrap Grenade. - Repositions using
Run n Gun and deals light damage to all players.
- Avoid the impact locations of
- Pistonhead Mechanic
- Stay at least 8-yards away from these to avoid being interrupted by
Shield Bash. - Interrupt
Overclock to prevent the haste on nearby mechanical enemies. - Interrupt Repair to prevent the healing on a mechanical enemy.
- Stay at least 8-yards away from these to avoid being interrupted by
- Weaponized Crawler
- When targeted by
Scrap Cannon, point it away from other players. - Deals moderate damage over time to all players with Shock Coil.
- When targeted by
- Mechagon Prowler
- Targets random players with
Pounce, dealing moderate damage over time.
- Targets random players with
Gunker Area
- Mechagon Trooper
- Applies
Nanoslicer to the tank, dealing light damage over time.
- Applies
- Mechagon Renormalizer
- Toxic Monstrosity
- Three Toxic Monstrosities must be killed in this area to free the Squirt Bots to spawn Gunker.
- During
Consume, run against the pull of the Monstrosity to stay out of the ever-expanding toxic pool around it.
- Touching the pool applies Consuming Slime (dispel, disease), dealing damage over time and absorbing healing.
- Touching the pool applies
- Gnome-Eating Slime / Gnome-Eating Droplet
- Deals light damage to all players with Acid Splash.
- Deals light damage to all players with
- Slime Elemental
- Don't stand in front of these when
Slimewave to avoid the knock-back effect and moderate damage.
- Don't stand in front of these when
- Toxic Lurker
- Interrupt
Suffocating Smog (dispel, disease) to prevent the stun and damage over time.
- Interrupt
HK-8 Aerial Suppression Unit Area
- This area includes Mechagon Troopers and Mechagon Renormalizers, detailed above.
- Anodized Coilbearer
- Interrupt Charged Coil to prevent the damage to random players.
- Purge
Defensive Countermeasures to remove the damage absorption effect.
- Interrupt
- Mechagon Cavalry
- Avoid the impact location of
Charge. - During
Rapid Fire, don't stand in front as it slowly rotates around to avoid heavy damage.
- Avoid the impact location of
HK-8 Aerial Suppression Unit thru Tussle Tonks
- Inside the Tussle Tonk arena, avoid the grid-like crevices in the arena floor as Buzz Saws will randomly move through them, knocking back players hit.
- Bomb Tonk
- Interrupt or stay at least 5-yards away to avoid damage from
Detonate.
- Interrupt or stay at least 5-yards away to avoid damage from
- Rocket Tonk
- Avoid the impact locations of
Rocket Barrage.
- Avoid the impact locations of
- Strider Tonk
- Stay at least 3-yards away from other players to avoid extra damage from
Flying Peck.
- Stay at least 3-yards away from other players to avoid extra damage from
Tussle Tonks thru K.U.-J.0.
- Waste Processing Unit
- Stay at least 10-yards away during
Mega Drill to avoid the moderate damage. - Don't stand in front during
Process Waste to avoid the moderate damage over time.
- Stay at least 10-yards away during
- Living Waste
- Upon death, deals moderate damage to all players with Volatile Waste.
- Upon death, deals moderate damage to all players with
- Junkyard D.0.G.
- Dispel Flaming Refuse (magic) to prevent the damage over time.
- Dispel
K.U.-J.0. thru Machinist's Garden
- This area begins with a conveyor belt gauntlet where players must avoid Flame Jets on the walls.
- Following the gauntlet is small event in the town square, during which King Mechagon will spawn several waves of enemies.
- Mechagon Tinkerer
- Avoid the detonation location of
Activate Anti-Personnel Squirrel. - Interrupt Giga-Wallop to prevent the damage to multiple players.
- Avoid the detonation location of
- Defense Bot MK I
- Dispel
Arcing Zap (magic) to prevent the light damage over time.
- Dispel
- Defense Bot MK III
- Dispel Arcing Zap (magic) to prevent the light damage over time.
- Purge Defensive Countermeasures to remove the damage absorption effect.
- Deals heavy damage over time to all players with Short Out.
- Dispel
- Blastatron X-80
- Avoid the impact locations of
Launch High-Explosive Rockets. - During Capacitor Discharge, move to the quarter of the room that's not covered in blue electricity to avoid the stun and silence effects.
- Don't stand in front during
Sonic Pulse to avoid the silence effect.
- Avoid the impact locations of
- Mechagon Tinkerer
- After the event, players must navigate a gauntlet of Detect-o-Bots.
- Avoid the blue circles around the Bots.
- Standing inside any of the vents/smoke clouds makes you immune to detection, even if you enter one of the blue circles.
- Mechagon Mechanic
- Workshop Defender
- Applies Chainblade to the tank, dealing moderate damage over time.
- Applies
Machinist's Garden thru King Mechagon
- This area includes Workshop Defenders, Mechagon Tinkerers, and Defense Bot MK III, detailed above.
- Spider Tank
- Avoid the impact locations of Launch High-Explosive Rockets.
- Don't stand in front during Sonic Pulse to avoid the silence effect.
- Avoid the impact locations of
Trash Debuffs to Track
- Major: Sledgehammer, Consuming Slime (dispel, disease), Suffocating Smog (dispel, disease), Flaming Refuse (dispel, magic),
Shrink (dispel, magic) - Minor: Grasping Hex (dispel, curse), Scrap Cannon, Nanoslicer, Arcing Zap (dispel, magic), Chainblade
- Enrages to Dispel: Enrage, Overclock
- Buffs to Purge:
Enlarge, Defensive Countermeasures, Defensive Countermeasures
Trash Addons
Healer DBM Settings for Mechagon Trash
Mythic+ Notes
In this section you'll find notes about certain interactions bosses and trash mobs have with the Mythic+ difficulty increase or certain affixes that make them more troublesome than normal.
- Mythic+ notes will be added soon.
Videos
[S4] Mythic 10, 1 Upgrade Clear, Restoration Druid PoV
Below is a video of me clearing Mechagon: Junkyard on Mythic 10 difficulty in time for a 1 upgrade during Season 4.
[S4] Mythic 11, 1 Upgrade Clear, Restoration Druid PoV
Below is a video of me clearing Mechagon: Workshop on Mythic 11 difficulty in time for a 1 upgrade during Season 4.
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