Miles Austin Debacle, TE Pick, Help!?

[forgreatergoods2]

With Miles Austin likely playing this week, do I sit a surging Laurent Robinson or do I put him in at flex? Here's my lineup, standard scoring non-PPR. Starting lineup is 1QB 3WR 2RB 1TE 1W/R:

QB: Eli Manning
WRs: V. Cruz, L. Robinson, M. Austin, M. Colston, M. Williams (TB)
RBs: S. Jax, R. Bush, W. McGahee
TEs: Gresham, Pettigew

Also not sure which 2 RBs I should play or if I should play all 3. Also, what do you think about Gresham this week? Pettigrew has been junk recently..I could also pickup Heath Miller.

Thanks!
-Josh