All trees (Wowhead)

Wowhead's level-30 Warlock: Affliction and Demonology drain-tank with the Succubus (Corruption and Agony, no Immolate, then Drain Life for the rest of the fight; health and mana are hidden on Forever, so Life Tap is your call), Demonology keeps Demonic Brand up and Agonies only big targets, Destruction puts Agony, Corruption and Immolate on every mob, Conflagrates just before Immolate ends, saves Shadowburn for the killing blow and wands with the Voidwalker. Amplify Curse on every cooldown; Curse of the Elements and Bane of Doom only on elites and bosses; no pack section. Wowhead's guides stop at level 30. An alternative to the recommended Warlock DPS premade, off by default: enable it and disable that one, or raise its priority.

Adapted from Wowhead: Forever level 30 Affliction Warlock, Wowhead: Forever level 30 Demonology Warlock, Wowhead: Forever level 30 Destruction Warlock.

In game: /rm set dps-wowhead chooses it by hand; it loads only for its edition and class, and is listed only for the specializations it is for. It ships disabled: an alternative to the recommended rotation for its specialization. Turn it on in game (Rotations, then Enabled) and either turn the other off or give this one a higher priority.