Start Tarik Cohen or Jordan Howard

Jordan Howard has put up less fantasy points than most waiver wire streams every week. Is it time to start Tarik Cohen. I used my waiver priority on him last week as insurance for my 3rd round draft pick AKA Jordan OW-ard. Who would you start in the flex?
Jordan Howard
Tarik Cohen
John Brown
Qb Tom Brady
Rb1 Melvin Gordon
Rb2 Alvin Kamara
Wr1 Tyler Boyd
Wr2 Kenny golladay
K Gostowski