|The information below has been verified with in-game data and the information on this page is correct, even if it looks stupid or makes no sense.|
Fact: The in game name of this zone is "Temple of Veeshan: Laboratory of Mutation [Heroic]"
These strats are for the heroic instance.
The Failed Mutation
Clear some of the blobs in front of him. Go up to the ledge that goes around the room. Pet pull the main mob while your entire raid force stays in front of the mob. When the emote comes everyone move further away while remaining in front of him. Keep doing this while attacking him down.
If you get the curse you will be mana drained and curse the others in your party so stay away from them. It spreads quick. If you stay in front of him and everyone moves when he drops his little bomb you should have no issues. Just go around the outside until he is dead. Should take around 1/4 of the way around or you wont have enough dps for the rest of the zone.
Pretty much a tank and spank but make sure you get out of the red circles which are big and frequent. He will port you so make sure you have trauma potions on you in case you get ported away, stuck in a circle, and need a cure cause you get immobilized when the trauma hits.
Merrig the Necrosplicer
Singular focus must be on or you wont kill him. Killing an add resets the mob to full health. Just burn him down and win.
Needs lots of dps and two good healers. You will get stunned frequently from the adds. Some people kill the adds but we just burn the hell out of the named. End of the fight gets tough with the adds and the stuns, etc. but if your team is good enough you should win.
Gangel/Gangel the Resurrected
Similar to solo instance with Barbares, after your kill him the first time a giant chest pops that if you open spawns that really spawns the real encounter. This mob hits very hard.
Strat: adds will come - kill them. When Necromatic Sphere is cast by Gangel, stop attacking him and either just kill the add or just stop attacking all together. After it wears off in like 6 seconds or so, resume dps on Gangel. If you hit Gangel while its up it heals him so dont do that.
Tips on final mob: Have healers on tank and curing since he hits hard. Have one person focus on Gangel and call out when to dps or not to dps him (when necromatic sphere is on or off). Keep Gangel debuffed big time as his multi-attacks can basically one shot your tank. When he casts necromatic sphere he drops his debuffs so debuff him right away - just dont attack/damage him.