How does my line up look?

I need help for my Flex spot this week. I am 1-4 and desperate to stack wins.

Below is my line up and I am not sure who to start at Flex (AJ Brown vs Damien Williams)

QB: Mahomes
WR: McLaurin / Dionte Jonson
RB: Chubb / Henderson
TE: Fant
Flex AJ Brown or Damien Williams

Bench: Javonte Williams / Julio
Bye: Eli Mitchell

I would always lean towards rb in a close flex call. So I would say one of the williams, because Gordon may be out this week also.

If Gordon is out, Javonte is a must-start. Even if Gordon isn’t out, he maybe on a snap count due to injury, which also makes Javonte a must-start.