Loup Blanc here. Haven't been able to work on this as much as I'd like--I've been very busy IRL, and the site being down has led me to focus on other things--but I have crunch done at least for the Dervish. In terms of party roles, he's primarily a damage dealer, but he's got a few tricks up his sleeves with some utility and skills. His main focus is not getting hit, which will lend him good survivability that really comes online around level 8 or 9, but he's already in a pretty good place there. After that, I think his feats will open up to take whatever the party could use, including maneuvers and other stuff. He'll also gain some good AoE style abilities around then, so he gets better as time goes by.