I'll pick Bella too, Brooke was holding back against Nikki going by the rules and basically taking it easier to extend the match, n control in the on top position the whole time, dragging her around the room by the hair etc. Nikki is tough, but undefeated she is not, she even admitted so in the off camera moments of that fight. There is also an unknown with Nikki having another child, which is an admirable thing, but isn't the same as not having one and training. That's another factor.
Dream match Nikki vs. Mira