I think Barger is in the mix as well.
Heineman, Schneider, Wagner makes 10
Barger is 11 (and pretty much a lock)
2 OF make 13.
You have Kirk, Vlad, Gimenez, Bichette, Clement, Springer, Santander as your 7 locks before the spring.
If the team prefers Santander and Springer to DH more often, then someone is playing LF a lot (Barger/Roden/Schneider)
If they want to have Varsho D, then Straw makes it and they let him hit for a week or two to see what they want to do (keeping him requires a 40 man spot, but if they option him a week in, they can option him next year without issue)
Edit: forgot Berroa in this
If I am being honest, Lukes is likely the lowest man of the group because he's not a great CF (might not be better than Roden right now), isn't as fast, but offers hitting in an OF that might need 2 bad D OF out there.