There is actually a pretty easy and fail proof way....
I think 6 can take him. Probably not more then twice in 1 run. (lucky COR 2hr) MNK/WAR/DRK,MNK/WAR/DRK,BRD,COR,SMN,SCH/BLM (embruva/stunga)
Killing him too fast can make the figher harder, which favors 6 good players.
Pchan speaks a lot of garbage but I think its doable with 6, possibly twice in one run. Ideally you'd want a 7th for TH and if you want a guarenteed win you'd have a 2nd pty standing outside of 50' ready for PD zerg incase of AoE terror.
There is also the upcoming AoE nerf which could make him even easier.
