Cold wave is useless for PvP. Firstly although the game description claims instant cast you STOP to cast it. Secondly it is pilled away in a flash. Because of this you lose distance if you were trying to snare a runner.
Frost Nova Book 1 and 3 is average. The whole series is NOT for chasing runners. The range is much too short. Book 2 is good for PBAE CC (point blank area of effect crowd control). When a bunch of lowbs zerg you hit Book 2 and everyone's 100% slowed and 50% frozen. Book 1/3 freezes them in a line (no one stands in a line in pvp).
Hope that's useful
