playoffs PPR

[Jake Chaney]

i have Torrey Smith Julio jones and Johnny Knox on the bench should i start one of them instead of roddy white rob Gronkowski or Jermichael Finley?
and
DeMarco Murray and roy Helu starting RBS BenJarvus Green-Ellis and Michael Bush on bench should i move them around

starters: QB: Cam Newton
RB: DeMarco Murray
RB: Roy Helu
WR: roddy white
TE: rob Gronkowski
TE: Jermichael Finley
D/st: Seahawks
K: David Akers

bench: RB: Michael Bush
D/st: Cowboys
RB:BenJarvus Green-Ellis
WR:Torrey Smith
WR:Julio jones
WR: Johnny knox
IR: Matt Schaub
IR: Jahvid Best