That's the build I've been running for years now!
Thief class, loaded up with as many weapon-based smite spells as possible. Right now at level 7 I've got Charge Weapon, Shielding Smite, Reaping Blade, Dawnbreak, and Revive. Smite Evil and Thunderbrand and Celestial Smite are all good too. I go with STR/AGI/WIL for attributes, and usually keep Brint and Cait with me. I run a 2hander (the new hammer from RynQuest, or the Spiral Blade) for maximum return on Twist the Knife. Can basically do whatever for other kit; a couple of Wizard Rings help out in the early game if you need some Toughness or Cunning instead of Will.
