The rotation and playstyle is simple: apply haunting curse after every second pop, keep your area of effect damage over time skills up, stay close to the target, and pop a big bird heal when you or your tank needs it. Ult on cooldown or during burst phases.
Haunting Curse and Simmering Frenzy are flex spots. Slot them out for Bound Aegis, Elemental Susceptibility, Critical Surge, Sated Fury, Daedric Prey, or a second sorcerer pet.