Hmm, I don’t mind your idea at all but it is hard to implement so I see your trouble. Some folks have given good options but I’ll offer a different way to do it. I’d have one attack per player since it is a god, let him wreck house. Maybe increase the number of enemies to accommodate the attacks. Since this is a god regaining their power and their trying to control it I’d have two DCs for their check each round. First DC is if they listen and should be passed most of the time maybe 10 or 15. If they don’t then it might be bad for the party but otherwise they attack the target as intended. The second DC should be failed most of the time, maybe 20 or 25. If they fail this DC the the god still acts as ordered but releases a chaos burst as it does. I personally always use the d10000 list of chaos burst, its fun.