Affront to Challengers

• Dodge the Frontal
• Don't overlap circles
• Bait Noxious Spores
• Try to kill as close to each other as possible.

Gorechomp

• Take care to dodge the Chains.
• If possible try to immobilize the far Jumping Add to reduce incoming damage

Kul'Tharok

• Stack for Draw Soul. CC and kill them. Don't let them reach the boss.
• Kick his casts!
• The rest is dodge things. xD

Mordretha

• Dark Devastation: Dodge, it rotates.
• Reaping Scythe: Tankbuster. Deals Shadow & Physical damage.
• Manifest Death: Position loosely around boss and take care not to clip each other with circles. Spawns Deathwalkers that chain-cast Deathbolt. Keep them interrupted or they wipe the group.
• At 50%: Echoes of Carnage spawn. Either:
  • They have a 8 yard AoE — dodge
  • Or a charge with no indicator — be careful!