Hurt by Allen, need Flex help

Rivers and Allen played last night, ranked #2 in playoffs. Allen hurt, .5 PPR. I had Allen and Cooper as WRs, and Golladay as Flex. Kamara and Elijah as
RBs

Now I hear Stafford may be out vs Buffalo. So, need Flex help. Who would you put in flex?

Golladay
Kenneth Dixon
David Moore
Penny
Jalen Richards

Golladay if Stafford starts. Richard if Stafford is out.