Based on her fight with Baars, Cyborg would destroy Holm.
Baars destroyed Cyborg from kickboxing/Muay Thai range but every time they clinched (MMA range) it was obvious Cyborg would rag doll her in MMA.
Having said that, Cyborg still does not stand a chance against Rousey. As soon as they inevitably clinch, Cyborg is going down (and not getting back up).
Yes, Rousey is THAT good.