Lots of good options, imo. Ice/Dark gets ample holds, a beefy heal, and lots of accuracy and damage debuffs. Ice Rad is more of a mixed bag. A little bit of everying: Damage debuff, resist debuff, accuracy debuff, slow and some weak holds. Also, your primary's fast animations synergize well with Accelerate Metabolism. Cold is a very team-focused set. If you don't mind leaning heavily on your primary, it can still be played solo, but your shields are best used to make your group untouchable, and Tier 9 secondary is devastating by all accounts.
The one I wouldn't recommend is trick arrow. It's really no better than rad or dark, with the added penalty of redraw. TA's main strength is with a primary which can dispense fire damage so your oil slick arrow turns into a huge burn patch. That's not happening with an Ice Primary.
I'm trying to figure out what to pair Ice with and can't decide between Cold, Dark, Rad. and Trick Arrow. Does anyone have any suggestions or personal experience?
Work in progress no more. I have decided that I'm going to put my worst spelling errors here. Triage Bacon, Had this baster idea, TL
"I'm going to beat the Jesus out of Satan!" My Wife while playing Dante's Inferno