I'm just about to start boosting my alts with my 70 lock (43/7/11) and have been toying with a possible respec to make things easier. I've only got 643 Shadow Damage though at the moment, and as I hardly play him at 70 I can't see him getting much more Spell Damage from Gear. I'm not averse to using some wizard oil\elixirs etc if it will make a big difference to the feasibility of the farming.

I want to keep insta corruption and Siphon Life tho, as I dont think I could live without them