I don't remember what I got at those levels, though I thought it was higher. I recommend watching your character and tuning the CC variables so that your lock is more efficient (if you see him resting when his health is too high, lower the restHealth, lower the drainHealth vars, etc). Basically you want it to be doing as much dps as possible with as little resting as possible. I played around for an hour with values until my lock was killing nonstop and resting once every 20-30 mobs (if at all). That's the goal and will give you the highest xp/hr.