1.25 PPR League Start/Sit Share Your Wisdom!

I’m in a 1.25 PPR league (1st year and not a fan), and I need to decide to flex Parris Campbell or David Montgomery.

I’m nervous about starting Campbell because I also have TY Hilton in the starting lineup… any advice?

I also have Malcolm Brown and Cam Akers, but there is still too much uncertainty in that backfield for me.