I agree...he is very tough. Roll with invective, make sure invective guy is the jail breaker. 4-5 shots with invective. Stay close together. Have a gally or truth spam the middle, and another on boss. Have another guy roll with a good void heavy machine gun. Its difficult but not impossible :) Good luck man. I'll see if one of the guys I did it with earlier posted a video. It was a decent strategy.