This is how Method most likely got their kill. During Berserk he's taunt immune, his damage is increased by 500% and movement/attackspeed by 150% but that's it, only making kiting/taunting back & forth impossible. Dispersion/Deterrence/Evasion/Guardian Spirit/Ardent Defender/Mirror Images should all work nontheless - buying your raid loads of time and greatly decreasing the dps requirements (looks like Method used 2 tanks + 5 healers).

