Sorry about taking time to get back to you guys. First off I want to say thanks a ton for all the input.
Ok, I changed the wording of Blade of Infinite Edge and Force Wave Slash to an altered version of what Veklim suggested, I added additional effective fighter level for the fighter feats, I used Debby's wording of Space-time Rending Strike but kept it Ex because it isn't a magical effect, and I fixed my mistake in snicker snack.
Does anyone have any suggestions for how I should word the expanded decapitation chance?