I don't know if her confidence is where it should be but if it is she should beat Nunes fairly easily. I still have no reason to believe anyone has anything for her in this division despite the fact that she still trains with Edmond. Nunes is a striker with meh take down defense and gasses after round 2. She has solid skills on the ground and shouldn't be dominated at the outset of the fight if she's on bottom but it's going to affect her cardio for sure. To add to that Nunes is not the smartest fighter and threw a leg kick against Miesha Tate in round 1, something like that Ronda would capitalize on and put an end to Nunes quickly. Basically Ronda wins this if she's her normal self.