Storm Touch and Scalding Touch are crazy good unless you use homebrew errata to prevent them from just letting you deliver all the touch attacks at once as part of the casting. Mummify is a save-and-damage-or-die. Choking Sands can at the least force a foe to lose actions, and at best kill him outright. Shivering Touch ('nuff said), Combust is good for a 2nd lv spell, Greater Bestow Curse, Plane Shift (why not send your foe to the quasi-elemental plane of vacuum or the positive energy plane?), Heal against undead, Harm against the living. I've probably missed quite a few other good ones, but I think this is a decent start.