Mostert or Miles Sanders?

I have Mostert and Miles Sanders for the flex position. Howard is out. I also Have E. Sanders, Kupp, and Locket and I have to play two of them in my WR slots. I could potentially play the third WR in place of Sanders or Mostert. Thoughts?

Mostert was so good last week, ride the hot hand. Gotta go Sanders and Kupp, but that one is a toss up I think all three are fine.