Mike Thomas for Mccaffrey?

12 team league, PPR, 1-4 on the year
Looking to try to add another RB1 to try to change things up and pair with Melvin Gordon.
RB-Melvin Gordon, Jordan Howard, Tarik Cohen, Lamar Miller
WR- Mike Thomas, Emmanuel Sanders, T. Lockett, A Cooper, Quincy E.
QB- Cousins

Figuring a RB1 would help me more than a WR1?