With that in mind, I really like the forsaker idea.
Wizards are a pain in the ass for me to run effectively as bosses or mini-bosses -- probably the biggest short-coming in my DMing. However, I think that a counter-spell whore may be in order. 
(speaking of -- anybody got a good link for that?)
A nice anti-mage might be in order; countering before engaging in melee. I've never seen a great one, but I'm sure the melee/gish anti-casters exist.
Or hell, bring in another SCM who thinks he's getting too strong by comparison.
