Is Carson & Sermon enough?

Idp Dynasty league Super flex, with PPR scoring. Start 1 RB, 1 WR, and 3 regular flex spots.

I have Aaron Jones, Chris Carson, Trey Sermon, Gainwell, Lindsay, & Stevenson at RB but want to trade Jones for a young WR before he hits the dreaded decline but I am not sure if I can trust Carson & Sermon to be my starting RB spot all season. While I start four of Ridley, McLaurin, J. Jones, Kupp, Meyers, Gallop and Bateman, with whatever young WR I can trade for?