From what I recall of old realmslore.

Bladesinger. Maybe take Acolyte or custom up a background. I think in some version they were very close to Bladesingers.

Dex Arcana Cleric, drow come with Rapier so refluff that if you need to. Use Blade Cantrips to brawl. Take the Entertainer Background and if possible grab the Rage of Demons alternate Awesome At Being Underground Background feature.

Blade bard also seems appropriate.