my tip: solo tank. with ilvl increases, its easily doable for pugs, as its been viable since it came out, especially if you wanna bring 3 healers and let 2 mostly dps the whole time since theres little dps check here. you pretty much clean up orbs all the time and leave one for the tank to overcharge just in case. warrior is optimal for this fight i think because of the huge health pool, and he short bursty IBs since he uses medium size hits on you in very quick succession. youll be stoneskinning and adloing a lot at 3 stacks on the tank so that bigger health pool is beneficial there too.

id say the biggest issue people have with the fight is not understanding chaotic. but if you solo tank it it takes the second guessing of whose turn it is to collect orbs.