>>536103602
They don't really work together unfortunately. Iuno is a heavy attack buffer and Carty does 0 heavy attack damage (see picrel).
Since Iuno has high personal damage though, you could in theory play her as a DPS in a dual dps Carty+Iuno comp, but that sounds really stupid. If you care about meta, get Ciaccona instead.
You don't need good teams to clear "some but not all" of ToA, so you're safe to pull them anyway if that's your goal.