I copied his tactic and destroyed mobs in Zul Farak, pulling 3 packs was no problem with arcane power, and I also tried Shatter Blast Wave build which was also insane, Blast Wave dealt 40-45% of my total damage but in BRD mobs get a huge damage boost, this is where a proper tank allows you to pull 3 packs and loot stuff while casters are drinking, making for faster leveling.