I'm not sure if the films say definitively but when Palpatine's face becomes disfigured in Ep. 3 .... is it really due to Mace or does he just finally stop disguising himself as Palpatine's normal face? Because in the holograms of Sidious it's hard to tell but it doesn't look like Palpatine's face if I remember right, does it?
So is he using the force to change his face or am I remembering incorrectly? Because I think it's obvious he could take Mace at any time but is waiting for Anakin to help him, so I wouldn't think he'd let the lightning damage him like that.