Ring of the Bold will provide the Mind Spell immunity, I believe. As for Uncanny Dodge, I have quite a few dex builds that don't have it, and I don't seem to have the problem. I do a lot of rogue/assassin based builds, but not all of them are. I rarely use barbarian levels for anything, except Mistress of Pain...I think the idea is to not get surrounded by enemies where that becomes a problem. Not an easy way to do that forthcoming, but killing them before they get close enough to mob you is a good idea...
