Hexblade's Edge

Kaelith uses Charisma for everything — Eldritch Blast with Agonizing Blast for ranged damage, but can hold her own in melee with a pact weapon when needed. Darkness + Devil's Sight is the signature combo for advantage on attacks while enemies can't see you. Pact slots recover on short rest, so don't hoard them. Hellish Rebuke is great as a reaction when something hits you in melee — punish them and step back next turn. At level 4, take the feat that fits your party's needs. If you're the only damage dealer, Eldritch Adept for extra invocations. If the party needs utility, Ritual Caster.