I've been leveling 3 locks also lots of fun, there affliction specced I've been only running em when they have lots of rested exp to burn thru.

They hit 50 not to long ago, like going to western plague lands where the graveyard is and the cauldrons doting up everything in sight then burning em down with rain of fire.

Planning on taking em into pvp, already have one level 80 lock still debating on the last char probably end up being either a druid or a priest. Also debating on the spec for em, I'm more familiar with affliction but I think demo would fun in pvp with 4 felguards out.