I've written about him in the character thread. You have to use three green; since he does true damage the rest I used purple. This gave the highest damage output. Could consider six green if you want to tank him up but take a damage hit.
He scales with MR as well so Barrier is better than Shield for your purple Talismans
Have fun!
Nicko-0517
Thanks nicko, he is a powerful beast. I played with him twice already and he handed it over to CH pretty well in Madness