[@The Captain] Thanks man! That's what I was going for: folk magic and folk religion. If I do it right, it'll keep Shikoba interesting as a magic user, but leave Drusus plenty of room to stretch his wings and really shine as the group's sorcerer. 

As I see it, Drusus is the college educated doctor who's an expert in his field and has a string of letters after his name; Shikoba's the wise old medicine man. If you need to make an effective poultice using only the ingredients available to hand, call Shikoba, but if you need someone to perform open heart surgery, call Drusus.