Competition is the best thing you could have. Like Drayton said, if it takes 4-5 guys to match Guapos production from last year, he'll run with 4-5 guys.
Personally I think it's going to be a mixture of EzE, Dontre and Rod Smith. EzE is running at around 225-230 now I believe and he is even faster than last year and has an even better grasp of the playbook. He should get a majority of those touches. Rod Smith if he can get his fumbling issues correct will be a nice guy to have in the redzone and Dontre on 3rd down situations where you can line him up in the backfield, in pistol, in the slot, out wide, etc.
Here's to hoping I'm wrong and that every single back is too good to keep off the field and we see a heavy mix of Dontre, EzE, Curtis Samuel, Dunn, Smith, and Ball.