Unfortunately, the character I have in mind could probably go toe to toe with all of them except Diabolus on his own... The Demons I envisioned him fighting when I created him were 10-50 tonners with anywhere from human to mach speed.

The Mage one would probably be the best match for multiple opponents, especially if it took place on a fresh battlefield. The others seem too specialized to center a multiple participant attack around. They'd likely end up engaging one at a time because they wouldn't last long otherwise. With her ranged abilities, the Mage could feasibly hold of multiple attackers better than the others.