Need Waiver help at RB. 14 team league

I have a 14 team league and ended up with Josh Jacobs, David Johnson, Latavius Murray and Adrian Peterson. Really in trouble if Johnson or Jacobs goes down. There are some question marks surrounding Kamara with his contract and back problem, so I’d like to hang on to Murray just in case. It would be AP getting dropped. Robinson, who according to beat reporters looks like the top dog in the Jags backfield is on the waiver wire. As is Brian Hill who has emerged as Gurleys clear number 2. Coaches are raving about him and how much he is dominating in camp. He is starting to look like one of the best handcuffs considering Gurleys knee issues. Any thoughts on what move I should make here?
Thanks in advance footclan!

I could also drop Curtis Samuel who I mentioned in my last post in this thread for one of these RBs if Peterson is worth holding on to until Swift gets up to speed