I had to reload this fight cause of the stupid harpers running in and triggering everything. My strat was to get thief to misty step to rafters to take out archers, and get my party out in front. A couple of the enemy ran into the mob of harpers. I got some cc and aoe onto the side groups while a hasted Karlach was able to make pretty quick work of the main enemy caster. The hunger of hafar spell was tough. Just had to suck it up and waste a turn using your action to get out. Also blew a couple scrolls. Pretty good fight but I was doing it on balanced so if you are on tactician maybe it’s tougher.