Seems to me if the Sox want to play the market - and I have no idea if they do - then they should stock up on the high-priced bullpen arms, because even at their inflated rates, they never seem to require more than 2-3 years. Sign Jansen and two from Fulmer, Estevez and Rogers. And then deal Houck and Schreiber while both still make roughly league minimum. BTV accepts Houck plus Schreiber for Pablo Lopez.
That leaves the Sox with Sale, Paxton, Lopez, Whitlock, Pivetta and Bello for the rotation and Jansen, Martin, Rodriguez, Barnes, Taylor, Kelly, and two from Fulmer/Rogers/Estevez in the bullpen.
If budget becomes an issue, Andrus for SS and Gallo for RF make sense given the market buzz (or lack thereof) and that both, while inconsistent offensively, are at least both elite defensive players. (BTV also accepts trading Barnes to St. Louis for Paul DeJong, but I’m hesitant.)
Still need a catcher. And, frankly, an upgrade at DH over Hosmer/Dalbec. I also suspect Verdugo is on the market for obvious reasons…