As of right now:

1B--Wes Rea, Fr. Cole Gordon is the 2nd string to me. He throws right, bats left. Pitcher also.
2B--Seth Heck/Matthew Britton, starting is between them. Fr. Ryan Gridley is very solid. Gridley needs to play some to get ready for 2016.
SS--John Holland, you have to go with defense first for this position. But Holland can do it all, he bats left too. I have no problem with Heck here either.
3B--Luke Reynolds/Matthew Britton, between these two. Reynolds has showed out. He is making great defensive plays and makes solid contact at the plate. Both bat left.

I think Rea will start all games with Gordon (or whoever) will play late to give that guy experience for 2016. I can see Britton rotating between 2B and 3B. And I can see Holland and Heck rotate at SS. But Holland needs to bat every game, so DH in order. Whatever combo Cohen goes with, it will be a good one.