Need some advice, first time in a Superflex Keeper League

Superflex League - Half PPR - 10 teams

I can choose between one first rounder or 2 players at any other round.

Who should I keep?

Saquon Barkley = round 1


Choose two(2) between these guys:

Miles Sanders = round 6

Kyler Murray = round 10

Mark Andrews = round 13

I am able to keep players for unlimited years but the cost will increase (1 round per year)

My draft will be Linear and I am at 6. So i will have 1.06, 2.06, 3.06 … 15.06

If I choose to keep Saquon he will occupy my first round pick. (1.06)

If I choose to keep Miles Sanders he will occupy my sixth round pick. (6.06)

If I choose to keep Kyler Murray he will occupy my tenth round pick. (10.06)

If I choose to keep Mark Andrews he will occupy my thirteenth round pick (13.06)