Please Help Me Optimize my Lineup

1 PPR League:

This is my current roster:

QB - Rodgers
RB1 - Leveon Bell
RB2 - Ingram
WR1 - Calvin Johnson
WR2 - Emmanuel Sanders
TE - Kelce
Flex - Golden Tate
K - Gostkowski
DEF - Baltimore v. Houston

Bench = Sammy Watkins, Antonio Gates, Shane Vereen, Jonas Gray, Dunbar and Randle (picked up this week just in case), and Seattle D.

I think my two question marks are Ingram and Tate/Watkins. I feel like I have to go Ingram over the rest, unless D. Murray doesn't play, in which case I'll probably plug in Randle. Watkins has fallen off and I just feel like Tate is the smarter play, even though I am also starting Calvin.

In case anyone's wondering, my opponent is currently starting:

QB-Luck
WR1-Randall Cobb
WR2-Antonio Brown
RB1-McCoy
RB2-Herron
TE-Olsen
K-Vinatieri
DEF-Detroit

Bench = Harvin, Fleener, Matt Ryan, K. Williams, Doug Martin, Gerhardt, Denver D