Grant, Barber or K Smith?

[Player]

I have AP penciled in at one RB spot, and plan to carry A Brown, J Jones as my WRs and L Robinson as my flex. So I need one more RB from this group:

Ryan Grant
M Barber
K Smith
P Hillis

I am leaning towards Barber as I think the Bears will play him as they are still pushing for a playoff spot, plus I think Barber will be running mad.

What who do you think?

Also, should I sit L Robinson so I can pick two from this list?