Need help setting my line up (Need to win or im out of the playoffs) PLS help

Hey footclan, need help setting my line up this week. Standard 12-team, im 6-5(first team out of the playoffs right now, but if i lose and the 4th place wins, im out because of hth record). Need to win, playing against the number 4 team(mixon, mack, julio, obj).

My team right now:
QB: Lamar jackson (Mahomes on bye, going jackson for the upside)
RBs: Saquon, Adrian Peterson
WRs: Aj Green, Sutton
TE: Trey burton
K: Lutz
D/ST: Jaguars(vikings on the bench)
Flex: dont know who to start!
Royce Freeman, Ellijah McGuire, Gus Edwards
Tyler Lockett, Larry Fitzgerald

Who should i start at Flex? And if Green is out, do i go Lockett?

I would go Edwards in the flex and then Lockett without Green.