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Mistress Sassz'ine, Healer Guide

Patch 7.2.5 Updated
August 8, 2017

Mistress Sassz'ine Dungeon Journal ModelThis page covers a healer-focused strategy for Mistress Sassz'ine in the Tomb of Sargeras. 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 with the fight as well as Dungeon Journal information. I'll continue to update it as-needed.

General Mechanics and Abilities

Normal and Heroic

This is a multi-stage fight with several abilities that are present throughout.

Abilities in all Stages
  • When Hydra Shot is being cast, players must stand in the line from the boss to the targeted player to help mitigate the damage dealt.
    • Being hit applies the Hydra Acid debuff, dealing damage over time, and preventing anyone affected from helping soak for 6-seconds.
  • The tanks will be dealing with Burden of Pain.
    • If the tank with this debuff is taking damage from the boss, it will deal that damage to the entire group.
  • Sets of three Abyss Stalkers will spawn throughout the fight.
 Stage One - ten thousand fangs

This stage starts when the fight begins and ends when Sassz'ine reaches 70% health.

  • Avoid the line of Slicing Tornado that moves across the room.
    • There are no gaps between the Torndoes, so they must come in contact with a Concealing Murk to make a gap.
  • Consuming Hunger summons several Razorjaw Waverunner that attach themselves to players, dealing moderate damage over time while using the following abilities.
  • Avoid the Thundering Shock areas.
    • Unless you have a Razorjaw Waverunner attached to you, then standing in one of the circles will remove it.
Stage Two - terrors of the deep

During this stage, Sassz'ine summons several large adds to the fight. This stage starts at 70% health and ends at 40% health.

  • Ossunet
    • Places Befouling Ink clouds around the room.
      • If touched, these clouds stick to players and deal light damage over time. 
  • Sarukul
    • Appears at the edge of the room and casts Devouring Maw, pulling players towards him and dealing moderate group-wide damage.
    • Any players that go within 15-yards of him will be devoured (denoted by a blue circle).
    • Disappears after consuming 3 Befouling Ink clouds on Normal, or 5 Befouling Ink clouds on Heroic.
      • Players with the Befouling Ink debuff should step into the purple circle to "feed" him the ink without taking fatal damage.
  • Vellius
    • Appears at the edge of the room and uses Crashing Wave, dealing heavy damage to players caught in the line extending across the room.
Stage Three - vast oceans of wrath

This stage combines spells and adds from the first two stages. This stage starts at 40% health and ends when Sassz'ine is killed.

Mythic Differences

  • There will now be Delicious Butterfish around the room for players to pickup.
    • For DPS and Tanks: increases damage done by 2% for each stack.
    • For Healers: increases mana regeneration by 350 mana per second for each stack.
    • Taking any damage causes the fish to fall off and sit on the ground.
      • Any fish on the ground can attract Dread Sharks.
        • Avoid these, they will devour all Butterfish and players within 10-yards.
Stage One - ten thousand fangs
  • Murloc Mash buffs all murlocs for each one not attached to a player.
    • This forces murlocs to be removed in a controlled manner, or requires snares and crowd control.
Stage Three - vast oceans of wrath
  • Murloc Mash is no longer present in this stage as there's no way for players to remove murlocs from themselves.


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Healing Strategy

Quick Notes, All Difficulties

Abilities in all Stages
  • Hydra Shot and the resulting Hydra Acid will deal consistent, moderate damage to affected players throughout the fight.
  • On Heroic, Jaws from the Deep will also deal consistent, moderate damage over time to affected players throughout the fight.
Stage One - ten thousand fangs
  • Players with Razorjaw Waverunner attached to them will need moderate healing over time and should be kept near full health so when they stand in Thundering Shock they don't die.
Stage Two - terrors of the deep
  • Players affected by Befouling Ink will need light healing over time.
  • Devouring Maw causes moderate damage over time to the entire group, and may require a group-healing cooldown.
Stage Three - vast oceans of wrath
  • Players affected by Befouling Ink will need light healing over time.
  • Players with Razorjaw Waverunner attached to them will need moderate healing over time.

In-depth Notes, Normal and Heroic

Consider this section in "beta." My goal is to lay out the order of events without necessarily providing an entire strategy for all roles (other sites do that already). The idea being it should help organize your cooldowns or pre-healing. Feedback is greatly appreciated as Tomb of Sargeras is my first time attempting something like this.

Detailed Event List

The event list lays out major boss abilities based on what time they occurred after the boss entered combat (denoted by [minutes:seconds], along with notes on how to identify or handle the mechanics. Once enough events have repeated to develop patterns, the patterns are noted below the event list. Numbers are based on a 20-man Heroic group.

For Mistress Sassz'ine, I've separated the events based on different Stages.

Stage One - ten thousand fangs
Stage Two - terrors of the deep

Timings for shared abilities reset when the Stage begins.

Stage Three - vast oceans of wrath

Timings for shared abilities and abilities from other stages reset when the Stage begins.

Based on the Event List, we can assume the following:

  • Stage One - ten thousand fangs
    • Thundering Shock occurs every 40-seconds, starting 10-seconds in.
    • Abyss Stalkers spawn every 30-seconds, starting about 20-seconds in.
    • Hydra Shot occurs every 30-seconds, starting ~15 seconds in.
    • Consuming Hunger/set of Razorjaw Waverunner occurs every ~25-seconds, starting ~20-seconds in.
    • Slicing Tornado occurs every 40-seconds, with no clear pattern on when it starts
  • Stage Two - terrors of the deep
    • Abyss Stalkers spawn every 30-seconds, starting about 20-seconds in.
    • Hydra Shot occurs every 30-seconds, starting ~15 seconds in
    • Devouring Maw occurs every 40-seconds, starting 40-seconds in.
    • Befouling Ink occurs every 20-seconds, starting 10-seconds in.
    • Crashing Wave occurs every 30-seconds, starting 30-seconds in.
  • Stage Three - vast oceans of wrath
    • Abyss Stalkers spawn every 30-seconds, starting about 20-seconds in.
    • Hydra Shot occurs every 30-seconds, starting ~15 seconds into each Stage.
    • Consuming Hunger/set of Razorjaw Waverunner occurs every ~25-seconds, starting ~20-seconds in.
    • Slicing Tornado occurs every 40-seconds, with no clear pattern on when it starts.
    • Befouling Ink occurs every 20-seconds, starting 10-seconds in.
    • Crashing Wave occurs every 60-seconds, starting 30-seconds in.

Debuffs to Track

DBM Settings

Below are the DBM settings I'll be using for the Mistress Sassz'ine. You can set them up however you'd like, but these ones should work well as a starting point. Some settings may be Mythic only.

Healer DBM settings for Mistress Sassz'ine

Videos

Heroic, Restoration Druid PoV

Below is a video of me and my guild defeating Mistress Sassz'ine on Heroic difficulty. There is no commentary, only game sounds.

[LGN] Mistress Sassz'ine, Heroic Tomb of Sargeras, Restoration Druid PoV (Game Sounds Only)


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June 28, 2017 - Mistress Sassz'ine healer guide updated with DBM settings, kill video, and in-depth strategy notes.

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