Flex: Sanders of Lamar Miller/alfred Blue?

Standard 12-team league, im down by 40 points(luck + sony).
I have lamar miller in my flex rn, picked up blue in case miller is ruled out. But i have manny sanders on my bench… should i take a risc and go sanders? Keenum hasnt thrown a td pass since week1.
My line up is:
Gordon and lynch
Julio and thielen
Who do i flex?