LMMMP team

[Apatheist]

In dungeons warlock damage should be equal to mage DPS on single targets. On AE fights it depends on the circumstances. Arcane explosion vs hellfire is about equal. If you weave in flamestrike and cone of cold effectively, mages will outperform warlocks on multiple targets while being less prone to interrupts.

However, don't forget the fact that the warlock can actually be used as a tank at 40+. Doesn't work particularly well for AE pulls because of hellfire being interrupted but SL warlocks are more than capable of tanking any dungeon boss. You can reach around 75%+ physical damage reduction on a warlock between armor, cheap consumables and talents.