Who to start - Murray or Carson and pick 1 WR

They fellas! First post here and looking for some start sit help.

.5 PPR and I’m currently down 10 points thanks to the Ty Mont injury, so I’m more so looking for the highest upside play.

D Murray or C Carson in the Flex? (Hyde and Mont are my other starting RBs)

Pick one for my WR2 slot (K Benjamin, S Shepard, JJ Nelson, J Maclin)

I’m leaning towards Carson and JJ Nelson.