Anyone got some suggestions for Warrior Only (Madness) challenge? Having problems with this..

Anyway, as for farming insanity, I'm using:
Doomsday Eddie - Yin / Yang
Killer Prime - Shadow / Health (but could probably use something better here)
Raven Witch - Forge / Cosmic
Musashi - Alchemy / Cosmic

it's not 100% bulletproof but wins most of the time, the occasional defeat happens less often than connection error anyway.