D. Lewis or Buck Allen

Half PPR. Just picked up D. Williams off waivers incase he gets majority of the work load. But I have Zack Ertz, his bye is coming up and wanna pick up Charles Clay off waivers. Who do I drop for Clay, Lewis or Allen?

I would drop Buck Allen. He’s already loosing carries to Alex Collins and once Danny Woodhead is back (eligible to play in week 11) , I except him to take over as the primary receiving back and surpass Allen.