Durumu the Forgotten
There will be a tank swap, taunt at around 4 stacks of Serious Wound. Step into Life Drain to intercept. During phase two, the raid should split itself between the yellow, red, and blue cones. Move each cone around until the three fog adds are revealed, and kill them. Move out of Force of Will and pools on the ground. During the third phase, be patient and navigate the purple maze while keeping ahead of the death beam. In the maze, stuff on the ground hurts, so stick to the cleared melee or ranged path. Tip: Point your camera downward to better view the cleared maze pathing.
Kite the boss to prevent him from picking up too many Living Fluids, and kill them. Tank swap at around seven Malformed Blood stacks and avoid dragging him over the purple Volatile Pools. Only tanks should stand in front of the boss. Collect the red Mutagenic Pools on the ground dropped by Living Fluids to become mutated, DPS the boss. Avoid the red pools when you are mutated.
Note: At this point in time, Raid Finder groups are doing this boss one of two ways. Either can be successful.
Method one: Single target the active golem adds until the boss eventually activates. This requires quick target marking and most Raid Finder groups won't have the patience. Method two: Stack all adds and AoE everything while the raid spreads for Crimson Wake. Burn the boss once activated. The off-tank should pick up any remaining adds. When Anima Ring spawns, melee should run through to release the tank.
If you're looking for a more detailed boss guide for the third wing of Throne of Thunder, check out our complete write-ups: