That's the build I'm using now, and a copy of the build downgraded to level 25. I buff with Courage of the Eagle, whichever Heart buff is appropriate for the incoming damage, Armor of Devotion, and Vengeance of the Piercing Cold (or Vengeance of the Winter Storm at lv25, Vengeance of the Frozen Earth in PvP). As for combat, here's my macro:
#show Massive Blow
cast Fated Blow
cast Massive Blow
cast Sanction Heretic
cast Lightning Hammer
cast Crushing Blow
I start by pulling with Bolt of Depravity and then Vex before looping the macro. If I'm in a hurry, or I'm low on mana, etc., I will skip BoD--but I generally stick with Vex unless it's a particularly weak enemy, as it is an easy-cast instant that also heals me like a fairly substantial HoT. The tree is organized around crits and additional crit damage, but you'll find that it also applies to your two heals (Mark of the Chosen and Healing Breath). When dealing with crowds of enemies, just throw on Glacial Shield, pop Rage of the North (if you're using the lv37 build), and spam Avalanche Strike (though be sure to supplement with Jolt when it procs, since it won't cause a GCD and does nice spike damage to your main target). For the most part, mobs will drop like flies. If you're running low on mana, pop Ageless Ice before starting in on your next enemy and just use Crushing Blow repeatedly until Ageless Ice has ended; you should have a (near) full mana bar at that point.
I've included two PvP-oriented skills: Battle Charge and Vengeance of the Frozen Earth for breaking snares, charging the enemy, and snaring them. These points can be moved elsewhere if you aren't going to PvP, as the skills are basically useless in PvE (or at least, the points are much better spent elsewhere). If you'd like some more AoE damage for taking down scores of mobs, perhaps you could spend a couple of points in Strike of the Maelstrom and Eye of the Storm instead.
The bottom line of this build is: MURDER. Straight-up MURDER. I've been mowing through mobs up to 4 levels above me like nothing. On top of it, the build's survivability is pretty ridiculous. Two heals, a shield, cleaving strikes, and the ability to pull with ranged attacks are all incredibly helpful. This build also works in PvP as well as it does in PvE. I have been consistently topping the leader-boards for kills, killing blows, damage dealt, etc. since the build really got serious around lv30. You crit all the **** time, you have a charge snare (Battle Charge), a buffed snare (Vengeance of the Frozen Earth), and a standard snare (Impede), you can pop DoTs (that turn into HoTs for you) on everyone without a thought, you can take some decent hits, you can heal yourself or others in a pinch, and you do VERY good damage from both the outside and inside of the fray. You will be stacking up to 5 DoTs on your target (if you're using Vex in addition to the macro) and their health will just melt away while you continuously crit them with melee smacks and Jolt.
I tried the Inquisitor/Cabalist setup at 32 to see what it was all about, and even though it was fun, I wound up coming back to Shaman/Inquisitor/Sentinel. Nothing beats this build so far. It does such ridiculous damage, and I can live through practically anything. I HIGHLY recommend it. Edited, Mar 28th 2011 5:46pm by haliphax