Divine Spawn that fought the Devil and God would be stomped by Morningstar. God and the Devil were laughably weak for their titles and anyone could've reached their level of power by consuming the fruit. That match wouldn't even be close. And when he fused with the Man of Miracles he became essentially omnipotent, since M.O.M is considered the omnipotent of their verse, making that version not allowed in battles. As for Omega Spawn, he doesn't have the feats to be in Morningstar's tier.