Need qb and wr advice for championship

Have championship this weekend and due to questionable players Im still not sure who to play. PPR league.
Goff or Smith at QB? Pick one. Currently playing Smith.
Demaryius Thomas, Devin Funchess, Joe Mixon or Keelan Cole at Flex? Pick two. Currently playing Thomas and Funchess.
Thanks Footclan. Been such a huge help this year. Appreciate it.