It's my favorite dom. And that guide above is outdated I wouldn't even bother using it.
Doms at this point in the game can do just about anything depending on your build/playstyle. You can actually make a good tank dom (Although tanking is a tank's job) You can make a good dps or range build. Or you can sit back and do crowd control. Really there are no limits to what a dom can do at this point.
As far as Triple Ice, you have everything you need with the three sets. You have powers that compliment you either range or melee. And Jack does nicely on his own. With my Ice dom I usually stay range distance and also rotate AOE attacks since Jack loves to pull up on your foes. But when it comes to teams and everyone wanting to blitz through everything I sitback and play crowd control and keep enemies held or immob. Truthfully speaking you're not going to out DPS a Corr or Blast. Doesn't mean you shouldn't build for dps, just something to keep in mind.
I can post my ice build but honestly it's gonna be one of those things where ymmv. But this topic has been discussed before.