Mahomes for saquon and gallman?

I’m 1-3. PPR 3wr+ flex

Mahomes
Aaron Jones
Hyde or Cohen
Beckham
D Adams
Kirk
Witten

Bench:
Duke Johnson
Marvin Jones
M. brown
Singletary

I’ve been offered saquon, gallman, rivers for Mahomes and Singletary

Do I take it and try to improve the RB position or do I Hope mahomes, Adams, and OBJ start hitting at the same time?