Seat of the Triumvirate Mythic+ Dungeon Guide

Decimate targets a random player, causing the boss to leap at them and create a puddle. Try to drop these near the edge of the room or overlapping existing puddles to conserve space, but don’t go too far from the current boss position so that melee DPS can maintain uptime.

Tanks be ready with a defensive for the Void Slash combo, and everyone should be ready to avoid the random target Null Palm frontal.

Oozing Slam applies a DoT to your group and spawns two Coalesced Void mobs around the room, which will explode if they reach the boss. Use slows, stuns, or knockbacks to hinder these mobs while swapping to them, or use long term CC’s like Freezing Trap or Paralysis on one of them so you can focus on one at a time. Also beware that these oozes form into a puddle on death for additional area denial.

Crashing Void speeds up Coalesced Void mobs while also pulling in players before exploding for a large hit of group damage and knocking players back. Make sure players are topped and try not to get knocked into a puddle. At the same time, you’ll want oozes to either be dead or CC’d for this cast, otherwise it’s likely they’ll contact the boss and explode.

Note that the boss and his two pets share health, so tanks want to keep them stacked to allow their group to cleave as much as possible.

Avoid touching the Void Bomb that spawn, instead cleaving them with the circle created by Phase Dash to remove as many as possible. If any remain, have your tank or a player with an immunity soak them before the Overload cast completes to prevent additional damage. Healers will want to make sure the group is topped before both casts, particularly Overload as it also has a DoT attached to it.

For the pets, assign at least 2 interrupts to Shadewing’s Dread Screech cast, ideally having a ranged kick on every even cast since it can overlap with Phase Dash. As for Darkfang, beware of additional random target damage from Shadow Pounce, using bleed cleanses or defensives as needed.

Avoid the Umbral Waves created by three Gates Of The Abyss the boss spawns nearby, and be ready to use a defensive if needed if you’re one of the 3 players targeted by Mass Void Infusion.

Mind Blast targets the tank, keep an interrupt rotation on this to help mitigate the high damage it does.

Umbral Tentacles spawn in sets of 5, each channeling Mind Flay into a different player. Cleave them down as quickly as possible to reduce your group's damage intake, using a defensive if needed.

At full energy the boss teleports to the middle of the arena and uses Repulse to knock all players back, before starting to cast Collapsing Void. Use movement abilities to get underneath the boss which remains safe during the channel, and be ready with healing cooldowns and group defensives to deal with the heavy group damage.

Dirge Of Despair does a group hit and spawns 6 Notes Of Despair around the arena that constantly pulse for group damage, healers will need to make sure they spread their cooldowns out to handle this consistent damage.

To help reduce this damage, players targeted by Discordant Beam can shoot an active Note in order to silence it, preventing it from dealing additional damage. Once all 6 Notes are silenced it triggers an intermission where the boss gets debuffed with Siphon Void, so make sure to save your damage cooldowns for that.

Beware that the position of the Notes can change when the boss casts Grim Chorus, which also creates a circle around active Notes that you should avoid and causes them to apply the Anguish debuff to all players every 2s, so you’ll want to transition to the intermission ASAP before the damage becomes unhealable.

Disintegrate creates beams that rotate around the boss, so everyone should be ready to move with them to avoid excess damage. Otherwise Tanks should watch the stacks of Abyssal Lance on the boss, being ready with a defensive whenever they hit 3 as that triggers a large shadow hit after a few seconds.