the higher frost chance for pvp makes frost bolt and frost shield more usefull than damage, cryo skills damage are nothing compared to higher ranks classes ones.
I woul freeze peole and use dark magic 9the bling is great) and the minions to beatb the crap out of everyone while they cant defend themselves als theres the sinergy of warlock and sorc skills.
the summons atack are dark attribute so I wonder what happen if you get those
(apparently you can get it on circle 1)