there's also no upper limit to this either. he just kept hijacking brains until he got what he needed.

I think they made Professor X too powerful, being the first telepathic hero, he suffers from the Superman syndrome, the only things he can't do are the stuff he hasn't tried yet. Did you know that he could walk? When he was the Shi'Ar warlord, he just decided, "I'm gonna walk now." and just got up off of his chair and started kicking ass. Just like Batman he cured his spinal injury by positive thinking.