What should I do with Wyll?

Hey there, hope you’re well.

For reference, my party is made up of Lialeth, a multi class Paladin (Oath of Vengeance)/ Fighter (Battle Master), Shadowheart, a pure Life Cleric and Astarion, a multi class Rogue (Thief) and Ranger (Gloom Stalker.)

I’m happy with their classes, but I would like to add Wyll to my traveling party. What changes should I make to him, if any? Should I respec, keep him the same, multiclass or something else? My goal is to have a balanced, possibly overpowered team.

Thanks for the help, if you have any other questions lmk.