Really? Strangle and Wither?? Okaaaay.....
About the only thing you can do is drop resist and take Med up. You'll have to deal with having no resist though.
Personally, I have resist on all my mage classes and some of my dex classes. I find that a dexxer can tolerate trapped boxes and such better then a mage, and if a dexxer is mana vamped it doesn't negate his damage capabilities.
Strangle and wither huh?