Milskidasith has got a point. Without 9th level spells no matter what special abilities you give the guy he won't be as good as a sorcerer, much less a wizard. However, you might be able to pull off a 3rd tier class if you give him nice special powers. You should specify that's what you are doing however so that people don't come in thinking that this class is supposed to be as powerful as a full caster or simply a variant Sorc. In fact doing that could allow people to re-flavor this and use it in campaigns where tiers 1 and 2 are nixed.