Any PLing is worth better than no PLing at all I say If you have Nostromo, you can just program it to cast Renew every 13 seconds on both your Warlock and his/her Pet (is how I did mine) without having to play with the priest at all and focus your attention on your warlock. You can kill 4 mobs simultaneously and anything over that and it gets tricky. Go affliction so u can have 3 instant dots. As Xzin said - try to kill mobs 2 lvls below you (at most even level) - spell resist at a low mana pool sucks.