I would think the Sox likely add just one starter.
In the lineup, they could address the CF/2b situation, depending on where Kike plays. Arroyo is simply not a solution based on straight up durability.
LF is another question mark. Verdugo full time? Bring back Schwarber? Go with Duran? Does a Verdugo/Renfroe platoon make sense in RF?
At least one RP is essential.
If they make a trade, the bait might include Bogaerts (whom I consider unlikely, of course I felt that way about Benintendi, too), Duran/Verdugo, D Hernandez (enticing fastball, pitiful control) and possibly Barnes.
The simplest plan is sign Semien and a RP (R Iglesias? Y Garcia? A Bradley? M Givens?) and Semien (2b) to start. And the surplus LF maybe dealt for a pitcher. BTV proposes equivalent pitchers like Zach Plesac (for Duran) or Triston McKenzie (for Verdugo). If Cleveland was interested, Plesac has been the better pitcher and is my preferred target…