WR & RB questions: Will Andre Johnson finally show up or do I gamble with LaFell, Sanu and Stills...

RB: Will Gio be worth starting, or do I use Herron or Helu and gamble?
I have one foot in and one out in the playoffs for my league...tight group, any loss could cost me...
Thanks
B

Starters
QB Peyton Manning, Den QB
RB Giovani Bernard, Cin RB P
RB Chris Ivory, NYJ RB P
RB/WR Joique Bell, Det RB Q
WR Andre Johnson, Hou WR
WR Odell Beckham Jr., NYG WR
TE Jason Witten, Dal TE
D/ST Chargers D/ST D/ST
K Phil Dawson, SF K
BENCH
SLOT PLAYER, TEAM POS
Bench Mohamed Sanu, Cin WR
Bench Brandon LaFell, NE WR
Bench Ben Roethlisberger, Pit QB
Bench Ravens D/ST D/ST
Bench Roy Helu, Wsh RB
Bench Kenny Stills, NO WR
Bench Daniel Herron, Ind RB