Still have a shot at playoffs.. What should I do

Won week 1 by scoring the most points of anyone in the league, proceeded to lose 4 straight. I have since won 3 straight and sit at 4-4, 3rd place in my conference in a 10 team league. 1st place guy is 4-2-2 (I play this week) 2nd place guy is 5-3.

My team:
Luck
Peterson
Alfred Morris
AJ Green
Mike Wallace
Gronk
Royal
Hartley
Patriots D/St
David Wilson
Welker
Isaac Redman
Jared Cook
Reuben Randle
Rivers
Geno

I've claimed Kenny Stills/dropped Randle so hopefully I'll have him by in the morning.

Notable FA's:
Locker
Pryor
Pierre Thomas
Marvin Jones
Nate Washington (had him but dropped him)
Martellus Bennett (thinking of dropping Cook for him)

Any advice on who to drop/sign if any? I'm thinking of starting Rivers this week as he is projected to drop 23 vs the Skins. I'll hang up and listen