I boosted with my 70 warlock and I did a SL/SL build and it worked perfectly.

http://www.wowhead.com/?talent=Iq0rVRbkoZbxczIizzes

I put the 1 pt in shadow embrace for PvP, so I use this build for that as well.

I bring out the blueberry and I have a cast sequence macro like:
/castsequence [reset=target] Siphon Life, Corruption, Curse of Agony

I just DoT everything up and put the VW on defensive. SoC and drain life as you like.
I never run out of mana unless I way overpull.

Let me know if you need more input! Good luck!

Edit: I also solo scholo/strat with this build.