Suggestions on RB MOVES? lost D. Johnson

3 wr start league, wasnt sure what i should go after with what i have.
RB’S: J. Howard, lynch, rob kelly.
wr’s: amari cooper, watkins, j. crowder, theilen, snead, and maclin

I wasnt sure if i should try to fill in that missing david johnson spot or try to upgrade wr’s since its a 3 wr starting league.
Thanks guy!