I am currently running g face for my smiter pally uber build and was wondering what if anything i should socket into my helm? I was thinking either Um for the all res, ber for reduced dmg or cham for cannot be frozen so i can switch out my raven frost for something else. any opinions on what is best?

I have an Um rune in mine (hc ladder). I like Ravenfrost so I would not swap that out.

I would go with Um Rune for res, however I am not aware of your full set up / switch items to mention any other option other than stacked Res with Um Rune. Oh, Raven Frost is a keeper,