I know most people will say you need an RB in the 1st/2nd round to be competitive. If you play in a flex type league with only 1 rb required, would it make sense to grab 2 of Chad Johnson/Holt/Steve Smith in a late draft position (say 10,11,12 in a 12 team league)? Then grab the best available RB in the 3rd/4th round?