As much as I love Mob, Urek plays in a different class. Unlimited potential doesn't mean much without feats and Urek's most outrageous feats occurred at 1% of his power.
Thanks to Rule N.4 this isn't an issue .Yeah, Urek is just nuts. Though I'm a little unclear on how ToG powers work outside of the tower since they rely on a sort of air/water like substance inside the tower. So outside of the tower... I don't know how that would work.