User blog comment:SomeoneYouUsedToKnow/.-.-.-.-.-./@comment-24994749-20171214122747

About Raven not picking a fight against CAME, even thought the odds would be stacked against those four...

Remember during the Fall of Beacon, Cinder was shown interacting with the Dragon Grimm. She talked to it and it seemed to acknowledge her to an extent.

Raven might not have seen that, but she might know/suspect Salem's minion can receive assistance from Grimm.

So the fight wouldn't have been CAME vs Raven, Vernal and bandits, but CAME and a horde of Grimm vs Raven, Vernal and bandits. And that would be a lot messier.