About the adds themselves, looking from the boss to the entrance of the room, DG the further add on the left, LoS the ones on the right so they come closer, use GG and spam the shit out of Blood Boil while keeping Adherent as your target to interrupt the Curse. It also helps to place DnD next to the pillar + I'm using AMS there but not sure if it does anything. Sometimes (especially when DRW is up) you burn through the adds so fast that they don't get to cast the Curse, sometimes you get lucky and the Curse gets resisted and sometimes rng shits on you and you get Curse or 2 in a row. In that case, it's important to remember o kill Deformed Fanatics (the ones looking like transformed ghoul) cause they pack 100k per punch and with DS on 15s cd, it gets nasty.
Good thing is, the MC'd guy sits on boss pretty much all the time and he hits like a motherfucker so you can burn through the shield relatively fast and once the shield is gone, p2 is a faceroll provided you still grip and burn down the Adherents asap.
The fight can be tricky but it gets easier once you get the hang of it.
PS. Try working on your gear, with 504 ilvl and MCing the add, I stil end up ~a minute before the berserk, sometimes more, sometimes less depending on how many Curses I get.