See, this is a good idea in theory, but here's the thing, although you could argue Sarah lost the fight against Lexi, and maybe even the one with Charlie Mancini too, these were both years ago now and those other two girls have stopped fighting. Sarah on the other hand has been on the go ever since then and now is pretty much untouchable in the catfight space.
Maybe Chikara could beat her insofar as she seems to be much bigger, and a fight with Keri Spectrum might have been interesting, but I genuinely think Sarah Brooke ties pretty much every other girl up in knots nowadays