Thaddius, Healer Guide - World of Warcraft

Thaddius Dungeon Journal Model This page covers a healer-focused strategy for Gluth in Naxxramas. 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 encounter, logs information, and Dungeon Journal information. I'll continue to update it as-needed.

General Mechanics and Abilities

During this encounter, players will fight against Thaddius' minions before engaging him directly.

Stage One - Stalagg and Feugen

This stage begins the encounter and ends when Stalagg and Feugen are killed.

Stalagg and Feugen are on the platforms to the left and right in the room. Stalagg on the left, Feugen on the right.
Shared Abilities
- Magnetic Pull teleports the current tanks to the opposite platform, resetting threat.
- Stay more than 15-yards away to avoid War Stomp.
- Must be kept within range of their respective Tesla Coils at the back of each platform to prevent Chain Lightning from being cast, dealing critical damage to nearby players.
- Must be killed within 5-seconds of each other to avoid being resurrected.
Stalagg
- Greatly increases attack speed with Power Surge.
Feugen
- Stay more than 30-yards away to avoid the mana drain effect from Static Field

Stage Two - Thaddius

This stage begins after Stalagg and Feugen are killed, and ends when Thaddius is killed.

After Stalagg and Feugen are killed, players must make a short jump to the back platform that Thaddius is on.
Every 30-seconds, Polarity Shift assigns Negative Charge or Positive Charge to all players.
- Players deal moderate damage over time to non-matching players within 13-yards with Negative Charge / Positive Charge.
- Players gain increased damage dealt for each matching player within 13-yards with Negative Charge / Positive Charge.
Deals moderate chaining damage to players with Chain Lightning.
If no players are in melee range, Ball Lightning deals critical damage to all players.
After 5-minutes, Enrages, gaining increased attack speed and physical damage dealt.

Season of Mastery Differences

Currently, I'm not aware of any mechanical differences.
There are new quests offered by Archmage Tarsis Kir-Moldir just inside Naxxramas, and it was suggested that these could lead to surprises that "have a significant impact" inside and outside Naxxramas.

Resistance Levels

All players should use as much Nature Resistance as possible without sacrificing other stats.

Healing Notes

The notes below mostly pertain to progression difficulty, meaning if you out-gear the difficulty you're on or use extra healers they may not apply.

Keep players near full health so they can survive Chain Lightning.
Keep the tanks near full health before Polarity Shift so they can survive the possibility of all healers needing to move.