Heroic Imonar the Soulhunter, Hope's End

Tank

Taunt off one another when your Sever or Shock Lance stacks drop.
Use active mitigation on the application of Sever, Shock Lance and Empowered Shock Lance.
Move away from players afflicted by Sleep Canister
Ensure that melee DPS can attack Imonar during phase two as the raid moves around as a single group.
Avoid standing within the beams created by Charged Blasts.
Avoid triggering any traps throughout the encounter.
When the boss flies to the other platform, follow him and interrupt his channel once all players have arrived.

Healer

Dispel players afflicted with Sleep Canister once all other players have moved 7 yards away (10 yards on Heroic).
Move away from players afflicted with Sleep Canister.
Avoid triggering any traps throughout the encounter.
When the boss flies to the other platform, follow him and interrupt his channel once all players have arrived.
Stack as a group and move together each time Shrapnel Blast is cast during phase two.
Ensure that you do not face the Charged Blasts beam towards the raid.
Avoid the Empowered Shrapnel Blast circles during phase three.
Move to the edge of the platform if you have the Empowered Pulse Grenade debuff during phase three.
Be prepared to heal ever increasing raid damage during Intermissions and during phase three.

Damage

Move away from players afflicted with Sleep Canister.
Avoid triggering any traps throughout the encounter.
When the boss flies to the other platform, follow him and interrupt his channel once all players have arrived.
Stack as a group and move together each time Shrapnel Blast is cast during phase two.
Ensure that you do not face the Charged Blasts beam towards the raid.
Avoid the Empowered Shrapnel Blast circles during phase three.
Move to the edge of the platform if you have the Empowered Pulse Grenade debuff during phase three.