10 man full ppr flex decision

Just need help decided on the flex this week. Recently traded for mark ingram and want to flex the man but boyd has been killing it lately and corey davis is coming off of his breakout game. Thanks for any input!

Lineup Currently:
QB: Big Ben
RB: Kamara
RB: Conner
WR: K. Allen
WR: E. Sanders
TE: Ertz
Flex: Ingram
Def: Jags
K: Succop

T. Boyd
Corey Davis
Alex Collins
Dalvin Cook
Trey Burton