Only Lvl 23 at the moment, but 3 spells I find very useful are: Demonstration of Faith - Adept 3, Charge - Adept 1, and Harm Touch. DoF allows me to solo should I choose. Charge is a very nice dmg (62pts) adept 1 at lvl 23 w/ knockdown. And Harm touch is well...HT.
I wish I could put down Graven Embrace, but so far the best use has been saving Noobs who are running from mobs. Cast it on them, gain aggro of what was chasing them, kill it, or ride of on Mr. Ed.
I hope we have more great spells, because I'm somewhat disappointed in the ones I thought would be really nice to have.