Yoshida to DH basically dooms Casas to the bench, AAA or a platoon at 1B with Turner with Turner being benched vs RHPs. I seriously doubt that happens, especially since Casas has been doing much better in May than April.
I think Duran might be the "odd man out," and shifting players around would not work to platoon Casas and Duran, since both bat lefty.
We are not going to platoon Turner, Yoshida and most likely not Duvall, either, especially since the RHB'ers are the short end of a platoon.
It seems CF, LF, DH and 1B are the positions of interest...
Red appear to be FT batters and not platoon material
RHBs
Duvall is best in LF with CF as an option (some might prefer he platoons. Not me, for now.)
Turner is best at 1B or 3B with DH an option
Refsnyder is a platoon player with the best wRC+ of any Sox player from 2022-2023, including Devers, Bogey, JD and Yoshida
LHBs
Yoshida is best at DH with LF an option
Casas is a 1B only player (Turner is better at 3B, and Casas fields 1B well.)
Duran is playing very good D in CF, but he has been slumping or returning to his norm, whichever you prefer to call it.
Tapia looks like the odd man out and has no options. (We could demote Duran to keep him around longer.)
As you can see, I have 3 guys (Yoshida, Turner & Duvall) in red for 4 positions. Shifting players around can allow one from Casas, Duran and Refsnyder to play everyday, so it might look like this:
vs RHP
CF Duran
LF Duvall
1B Turner
DH Yoshida
or
CF Duvall
LF Yoshida
1B Casas
DH Turner
vs LHPs
CF Duvall
LF Refsnyder
1B Turner
DH Yoshida
I could see us making a trade to make this choice easier, and when Story returns, we'll have a new set of choices to make with kike now added to the CF mix as a RHB, assuming he is hitting better.