Ray of Frost (Cold Blood) - with this build setup, RoF is free to cast. FREE. In fact, you will regen AP while using it. Power of the Storm reduces its cost from 10 to 7 AP per tick. You will use this for single target DPS and to "tag" multiple targets to stack slows.
Frost Hydra- a cheap AOE snare, helps keep mobs grouped together and away from you so you can be sure to hit them with....
...Comet- this is your AOE power attack that also gives you yet another snare. I was routinely critting them for 1,200,000 damage or more. You can burst up to 2 of them at a time as well.
Power of the Storm: reduces all AP costs by 3 AND acts as if you have "sniper support"- it will strike down enemies by itself while you go about your business. Yes it's that good.
You want as much DPS as possible as this build does not rely on any defensive skills.
Frostburn Gauntlets are the most important gear piece here, especially ones with a perfect 6%/30% Damage roll ). I would even go as far as to say that they are a BiS item, if for no other reason that they are guaranteed to increase your damage output by a fixed amount, which scales with your other gear.
As always, you will want a black weapon to take advantage of any "Adds x% to X damage" you may have,preferably one with Life Steal, to add to the 1.5% you'll get from Blood Magic. It doesn't have to be a Skorn or even a 2H weapon, but those work best when using skills that are not dependent on attack speed as you'd be using here.
The combination of the DPS, the synergy, and the snares make this build a great one.
I can show you tactics if you add me in game.