You know, it would probably be easier and more thematic for the 2 of you to just do Dante + Vergil vs 7 Sins.
He wanted to do specifically a 2v2 or a 2v1, and I can understand why he'd want that, there is a different kind of dynamic to those things. But if he wants to do that specific matchup that's fine too. But as for Vergil he was more interested in 1v1.
Yeah, I prefer a 2v1 or 2v2 matchup or even 3v3 and free for all could work as well.