It's a Shame we'll never see more of Darui. It would have been dope to see a Black Lighting Release Chakra Mode
Ay would have caught him.
So are you asking who would win? Momo can fly so Darui can't fight him with taijutsu, so he'll have to use ninjutsu, which Momo absorbs. It took Gaara Sasuke and Darui to beat Momo. He ain't beating him alone.