Flex for Quarterfinal

Hey everyone, this is a little early in the week but im already not sure who im tossing in my fex for this week. we have 2 flex spots and im debating between
-Sterling Shepard against PHI
-Miles Sanders against NYG
-James Washington against ARZ (seeing juju may be out again)
-Singletary against BAL (not a good matchup just wanted to add in)

My starting WR rn are Lockett, Tyreek Hill, and Deebo Samuel
My starting RBs are Lev Bell and Chris Carson

Thanks for your input and goodluck to everyone in the playoffs and better luck to anyone next year.