The best PvE Build for Warlocks (50+)

[metempsicosi]

until u receive a lot of spell damage and crit go for improved drain life that gain bonus damage from dot without your spell damage from gear

[Air*]

indeed.. was trying out many speccs while levelling my lock (even destro ^^ and affliction/destro hybrids XD) and kept going back to a specc similar to the one you suggest