http://www.wowhead.com/?talent=IA0MVRfkkZZxx0tr0tuuThis is what I run with. I used to run SL/SL, but I just find this spec a little more fun to go around with. Even in the crap gear my warlock has I still do really well. It relies heavily on DoT and instant cast burst. Drain or SB as needed. :3
SL/SL is better if your more worried about survival, but if you aren't worried as much, off specs like mine can be really fun and enjoyable.