I'll be honest, if I have to choose between the two of you, I'll probably choose Taiga, simply because it's tough for me to think of the Bursar as a malevolent force. The Bursar is, essentially, benign. He doesn't have any violent motives, he doesn't really have politics beyond wanting to sit in a quiet room, and the only magic he does is when he hallucinates he can fly and then actually does.
So, yeah. If it comes down to Bursar (ranagrande) vs. Undeclared (Taiga), I'm voting for Taiga.