Since you don't want to heal and do want to be able to survive, you need to go with assassin. Yes, you have to use a double-bladed lightstick but it's a small irritation compared to the rough time you'll have staying alive as a dps non-heals sorc.
My main is a 50 assassin and I have a 40 sorc. Trust me, if my sorc wasn't 100% heals I wouldn't have made it to 40 without taking a tire iron to my computer. I know I might get flamed by a posse of dps sorc's but I really have nothing but admiration for those who can successfully play one