12 Team Super Flex Dilemma

I’m in a dilemma! In my Superflex PPR 12 team Dynasty I have the 2,4,8 and 10. My current QB’s are Tanny, Carr and Foles( I know it’s a rebuild) 1 is going Burrow. And the 3 wants JT or Tua (whoever I don’t take) I’ve done a ton of mock and think based on teams after me and their needs I think I can get Herbert at 10. But would you pass on Tua to get JT and then take CEH at 4? My RB’s are Jacobs, Kerryon and Henderson (I know also not ideal)