Warlock Hexblade (3), Paladin (x)

Boon: Pact of the Blade

Eldritch Invocations: Curse Bringer. Need minimum 5 lvls

Turn 1.1 Hexblade curse (bonus action)

Turn 2.1 (bonus action) Wrathful Smite

Turn 2.2 (normal action) Greenflame Blade

If melee hit spend 1 spell slot for Curse Bringer (no action) and 1 for Divine Smite (no action)