Waiver Wire Options: Pick Up Stills?

I just looked in one of my leagues waiver wire and Stills made it through waivers. Do you drop a back like a M. Sanders or D. Montgomery and grab him? My only other option would be to drop C. Wentz who is my 2nd QB. I have been starting Cousins the last few weeks anyway and his next 4 matchups go @ Buffalo, @ Chicago, BYE, NE. I don’t know that he’s usable until almost into the fantasy playoffs week 13-15.

Depends on your roster.