Like I said before, I'm not used to 2 QB leagues, but based on how they are valued in your league, I think you have to consider keeping three of Brady, Wentz, Smith and Mariota. Also, I know that in keeper leagues that early R1 draft picks aren't as valuable as in standard, but I would at least consider keeping one of Collins and McKinnon and tossing back Zeke, unless you think he's a top 2 RB, which I don't. If it were me, it would be Thomas, Smith, Wentz, Mariota, Collins. I think Zeke's a top 3 RB. He hasn't really been hurt and has been a top back on a per game basis in his 2 years, especially non PPR. Thomas for 9th is a no-brainer. I'd probably only keep 2 QBs, you can always add a 3rd in the draft. Smith and Wentz would be my choices. Collins > McKinnon in non-PPR and I don't like McKinnon's chances of staying healthy with full RB load. I think OP was on the right track.