for the solo (duo) version go there: Chelsith: The Ancient Vault (Advanced Solo)
please post strategies for bossfights!
Murmaz the Believer (Heroic) We pulled him from far away and just tanked/spanked him. No sense running into his room to kill the trash - they dont come along with him.
Overseer Kisiz (Heroic) Adds come every few seconds - have tank grab them and heal through any damage. Burn named entire time with any AE dmg on the adds.
Taskmaster Xatik (Heroic) (incl. his 2 sidekicks) Same as the advanced solo instance. Mostly a tank and spank with multiple mobs.
Guardian of the Deep (Heroic) Click the upper "Crystal Shapers", fight the adds Click the lower "Crystal Shapers", fight the adds Kill the main mob
Spirit of the Deep (Heroic) Same as the Advanced Solo - attack him until he goes to one of the lampposts, take down the adds. Rinse and Repeat.