Playoffs flex help

I’m in a Full PPR League. These are who I can flex.

Gus Bus vs TB
T. Boyd vs Oak
Justin Jackson (assuming he starts) vs KC (worst DFS against RBs).
T. Coleman vs Arizona (ew)

Who should I flex and why? Also, I’m United Nations on the right side.

If Jackson starts i’m okay with him. If he doesn’t go Gus Bus.

Good Luck