Oh, one more point in regard to Baxbart's cogent post about the difficulty of this: consider gettng access to Martial Arts somehow. It's the book that makes complicated battles between high-powered characters much easier, once you get to know it. It has expanded and clarified rules for many types of attacks and defenses, stances, cinematic fighting techniques, and bread-and-butter stuff like targeted attacks and combinations. If you find that everyone is finding it impossible to hit each other due to high defenses, it could be very helpful.