Plutonus the Immortal is mostly a DPS fight after your tank and crystal clickers learn the mechanics of the fight to keep his energy down. For this fight you want all of your DPS using the best specs possible and your debuff/buffs should never fall off because for your first kill you will probably only survive by a couple of seconds. Your main goal is to manage his energy by breaking Galvanic Foci’s and using Crystals on the ground while DPS’ing him down.