I need to start 2 RBs from this list. (0.5 PPR)

My RB situation is in flux because CMC is out for a couple weeks. I managed to get Mike Davis by sitting on my waiver (I didn't use it until now.). Would you start him?
Mixon and Gibson get pretty good volume but aren't scoring many fantasy points.
Murray doesn't seem useful. Both Rams are banged up, going against the Bills, neither seems worthwhile to start either.

So I guess it's 2 of the top 3. What do you think?

Mike Davis is on a lot of start 'em lists

Davis for sure - there’s nobody else there.

and Mixon is juicy because well, our defense sucks.  
 

I think the packers will lead the whole way vs the Saints which makes kamara more valuable especially in ppr.  
 

don’t trust any rams rbs right now. 
 

gibson is the lead guy in Washington but that could be a low scoring and boring game so I don’t expect a ton from him and I’m considering starting McKinnon over him.  

Mixon and Davis

I get the Mike Davis hype - It's real slim pickings on the Panthers after him. And he had a bunch of dump-off catches after CMC left the game, which is encouraging. Not sure I believe it all though. And the Chargers D doesn't make it easy. Gibson is in some kind of timeshare with McKissic and/or Barber.

Now Julio Jones is iffy. If he doesn't play, looks like I'm playing all 3: Mixon, Gibson, Davis (one at Flex).