Who do I need to start?

Who do I need to start at RB/WR/FLEX

RBs:

M. Forte (CHI) @ ATL

A. Morris (WAS) @ ARI

L. Miller (MIA) vs GB

A. Williams (NYG) @ PHI

T. Gehart (JAX) @ TEN (thinking about dropping him

WRs:

V. Cruz (NYG) @ PHI

J. Maclin (PHI) vs NYG

A. Green (CIN) vs CAR (hurt so he won't play)

W. Welker (DEN) @ NYJ

MY QBS are T. ROMO and M. RYAN

TE - R. Gronkowski

DST - Patriots and Steelers

K - A. Vinatieri

I thought about Cruz and Maclin as WRs but I don't know about flex

Miller or Williams.

Miller - Moreno is coming back and plus MIA might be behind GB so they might abandon the run.

Williams - Do I start that many people (3) that play in one game? It might be high scoring but it also could be low scoring which would suck if I did start all 3.

Welker - He has seen his share of looks but hasn't scored any or gotten much yardage and Peyton loves to pass the ball to everyone. It is NYJ (my team) but DEN might be up early and go to the running game.

Thanks in advanced for the help. Also what do you think of my team (10 Team league)?