Couldn't have said it better myself.

When I first created Doc, I didn't have much of a plan for what he was going to be like. I knew the structure I wanted, I just didn't know the rest. After about a month, I started feeling a bit dry with him. I was thinking of slowly dropping him and bringing in someone else. I just didn't feel like I could go the distance with the Doc. After a while and a few more development stories, I'm still using him and enjoying it every step of the way.

Cain, reconsider limiting yourself so much to either Madness or Warfare. Even though the Doc is, in a sense, a pretty unbelievable character, I make him work in both Warfare and Madness settings. Don't limit your character so much and let him develope in many different ways.