RB Waivers/Upgrades?

Current RB room: D. Mongomery, A. Mattison, Z. Moss, S. Perine, J. Wilson Jr., K. Miller. Waiver wire options: C. Hubbard, C. Akers, D. Cook, T. Bigsby, (Bigsby, Akers & Cook recently dropped) J. McLaughlin, R. Dowdle. Who to add and who to drop and why? Thanks!

Bad week for waivers. McLaughlin is worth 10% or so play but nothing else I want. Other than Montgomery and maybe Mattison/Akers, all are dropable.