You need a true 3 down back that can catch passes out of the backfield and keep him in for all 3 downs.
This adds to the element of surprise in the defense isn't sure whether your going to run or pass.
I'm thinking someone like Jonathan Taylor.
Daboll also needs to use this back in more checkdowns.
You also need a true pass catching tight end thats an offensive weapon. This TE needs to develop a real synergy with Josh. Think of a Ertz or a rookie like him.
This will take a LB out of the box in pass coverage opening up the running game.
So more element of surprise with 3 down back and true pass catching TE