Need help with RB2 and Flex spots

Who should I plug in for my WR2, RB2, and flex from among these
12 team PPR

Roethlisberger
Keenan Allen
Fuller
David Johnson
RB2 - ?
Rudolph
Flex - ?

Plug with:
R. Cobb
John Brown
Phillip Lindsay
Alex Collins
Clement

thoughts?

I’m leaning towards Lindsay and Cobb, possibly Clement instead of Lindsay if Ajayi is out

I’m on board with that, except I think I’d do Lindsey + Clement (if Ajayi is out). Lindsey + Cobb otherwise.