For reasons stated above, I'd also go with Colston and Benson.
Benson is a workhorse type of running back and will always get nice yardage. This also helps Dalton out a bit by stabilizing the offense. Not just that, but you even said it yourself. Indy run D not particularly amazing.
And Colston because I consider him the better option @ WR that you have. Marshall is playing with a new QB and will be up against Revis. Odds don't look too good for him.viewtopic.php?t=503643