Ok, I'm stuck on the boss named "Cathedral." I'm having a rather hard time beating him, and I was wondering if anyone had any tips for it. The best strategy I have so far is to break him, down him, and beat him with people who have aura swod on them. The down side to this is that every time I get him down to about 11,000 health he casts double regen and then medica 3, gaining around 20,000 life back. Other than that L and H stun is giving me no ends of trouble.

So my question is, does anyone know an effective way to kill this guy.