Uses Saboteurs to inflict the good stuff. And use Synergist for Haste and Protect. Build up the chain gauge with Ravs, and unload with Coms when its staggered. If you're using Lightning as the leader, once its staggered, use Army of One to really build up the percentage. If you're using Fang, try to get it as high as possible before it depletes. Then use Highwind for MASSIVE DAMAGE.

You think this fight is bad? Pretty soon, there's one against both this guy AND the Emperor dude.