Hi Cakebread -- I don't know if you're going to get much more info from testing, no matter what test you use! The truth is that your dc is simply beyond the scope of the tests to measure, and the tests really do fall apart at the tails.
Your dc might do better on a WISC... But there's not a lot of room for improvement on those scores! There is the extended norming, which would produce a higher score, I suppose ... But I don't know that those would really give you a ton more info. Your dc's achievement speaks for itself!
