I would be more than happy to have Faulk as my #2. I expect around 1,200 combined and 12 TD's from him. Injuries are a concern but two of the backs you mentioned also were plagued with injuries last year. Dillon was healthy for all of about 5 games last year and as for DD
In his rookie year alone, Domanick suffered from a broken right hand, strained groin, bruised chest, sprained left ankle, and bruised right quad. That list of injuries cost him "only" two regular season games and a month of preseason work, but the quantity of maladies in one campaign is a concern.
Most sources have Faulk as a borderline #1 and I tend to agree especially if handcuffed to Jackson.