I would go full desto spec.

https://thottbot.com/warlock/t#/I233/EOK2vWLKr

imp CoA instead of Imp Sould Leech on 3 of them

/castsequence reset=15 Immolate, (imps fireball), Chaos Bolt, conflagrate, Incinerate, Incinerate, Incinerate, Incinerate , Incinerate