Ice / Atomic go well together. You very quickly have two quick cast single target ranged holds (1 in primary,1 in secondary) for controlling bosses and good damage output overall - I have mixed feeling about Bitter Freeze Ray due to the animation time - sometimes I'll open with it solo. I slot my primary holds for damage and secondary as normal holds. They are good for a blastroller or general blasting/blapping. I wanted a blastroller so I have 4 ranged ST holds and an aoe hold between primary, secondary and ancillary abilities - bosses and eb's without ptod get locked down. Your sustain has regen, status resists and a recharge buff, it's great. My highest character is ice atomic (vetlev 53ish). It's a bit lacking in aoe but otherwise tears things up (blizzard and judgement help the aoe issues). If you play to incarnate and like the control and debuff aspects I'd recommend trying for your alpha T4, Intuition Radial Paragon which really meshes well with almost all your powers in primary and secondary and still has a damage boost. ( For all powers: Increases Hold Duration effects, Defense and ToHit DeBuff effects, Slow effects and Damage by 33%, and Range by 20%. )