I would trade Abreu over Rafaela or Duran as well I just mentioned Duran because his name has been floated around. To be fair, at the end of the day, no one is untradeable for the right price. Duran does get you the most.
I don't believe anyone is taking on Yoshida or Story's contract. You'd have to subsidize most of it, so it wouldn't be much of a salary dump. Sox would likely have to part with high quality prospects to get 1/2 that money off their books. Or take a contract back. And if they're not bringing back quality pieces to compete now, it's really a waste to shed the salary (unless they can get under the cap and reset)
Buehler is not a #2. I'm sorry but he's not. I was a fan of the signing, and he might be again at some point, maybe even this year, but despite a very good playoff run last year Buehler has not pitched like a #1 or #2 since 2021. He's also a free agent at the end of this year heading into his age 31 season. You're either going to Q.O. him or trade him, if the season looks lost you trade him.