Might/Power. I would be fine with it, as I'm perfectly happy to throw simulationist attributes overboard. In all honesty, I would prefer attributes that reflected the characteristics of a soul more than a body, as that would (1) mesh well with the soul-oriented power of PoE and (2) would probably avoid confusing/pissing people off as much as assigning new roles to attirbutes they are familiar with doing a certain thing.
Batman is mentally ill.