Here is a great guide for warlock/cleric.
viewtopic.php?t=62280 The only skills that I dont think u need from here are migraine, dusk armor, the offering skills, and glut healing, over healing is also optional. Also, u might want to get all of DoTs (blaze, toxin, decay, and curse breath) instead of just blaze , toxin, and the AoE DoTs.