RB Dilemma week 8

I have Carson, McKinnon, Joshua Kelley and Coleman - and I need to start 2 in a 1/2 PPR.

Seems to me like I should start Carson if he plays, and Kelley is a safe floor play… But I’m already losing my matchup after my opponent flexed Curtis Samuel against me. This makes me want to start a 49er as a potential ceiling play.

So which 49er do I start? Or just do a huge dice roll and start both? I’m completely stuck