Standard FLEX option help

Who would you flex in standard league:

Lamar miller/C. Sutton/M. Valdes-Scantling

My team
QB: streaming
WR: OBJ
WR: Hopkins
WR: S. Watkins (swap for scantling or sutton?)
RB: Kamara
RB: aaron Jones
TE: Doyle

Bench
sutton, chubb, scantling, landry, R freeman, McCoy