This video shows the fight from a shadow priest point of view.I am mainly on M'uru during phase one,switching off to Void Sentinels and Berserkers for DOT then back to M'uru,and focus on Darkness for dispelled Dark Fiends.You can clearly see the entire room and how we tank adds,handle with voids,and the best timing into phase two.
In phase two,M'uru will transform into Entropius,it is a tank and spank with crazy AE damage encounter.You can see void zones that spawn all over the room with a Dark Fiend which has to be dispelled.In the meanwhile gravity ball that moves randomly in the room and hurling people around.