Flex: Mack, Gibson, or Marvin Jones? PPR

I have Jonathan Taylor as my RB2. I put Mack in my Flex all week but I’m contemplating flexing Marvin Jones with Halladay out. Gibson was also in the running all week. PLEASE HELP

Marvin Jones. However, if ur projected to win by 10 Mack maybe a good safe floor play but conversely if your projected to lose by 10 Gibson is the hail Mary you might use.