Reference (SimulationCraft)

Reference only, off by default: SimulationCraft's order reads Immolate, Backdraft, charges and cooldown timers, which Midnight hides in combat. Soul Fire and Incinerate before the pull; on three or more engaged enemies Rain of Fire at 3 shards and Cataclysm; then Soul Fire at 4 shards or fewer, Chaos Bolt only at 5, Conflagrate at two charges or below 4 shards without Backdraft, Summon Infernal, Malevolence, Wither or Immolate in its last 30%, Ruination, Cataclysm, Infernal Bolt at 3 shards or fewer, Incinerate.

Adapted from SimulationCraft: Destruction Warlock default list.

In game: /rm set destruction-simc 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.