Move 1
Resign Marcus Smart. Whether he accepts Qualifying Offer ($6m) to remove restricted status for next year's free agency or agrees to a short term (2 years) meet in the middle annual salary of $13m/year.
Priority: 1st
Move 2
Find a center to take a similar deal as Baynes. Maybe it's Baynes. Maybe it's Alex Len. Mayb it's Nerlens Noel who could be a perfect CBS reclamation project.
Priority: 2nd
Move 3
Resign all worthy league minimum players from last year. Jabari Bird, Shane Larkin, Jabari Bird. This will fill out our bench. Larkin might command more per year which would be worth it if move 4 below comes to fruition.
Priority: 3rd
Move 4
Find a way to consolidate assets and redundancy on current roster to move up in draft or secure role player or both.
Scenario 1: Celtics trade Terry Rozier + Marcus Morris + Pick 27 to LA Clippers for Patrick Beverly + Pick 12 OR 13
Scenario 2: Celtics trade Marcus Smart (resigned @ 13m/year) + Marcus Morris + Pick 27 + 1 of MEM/SAC/LAC picks to Orlando for Nikolas Vucevic + Pick 6 (Mo Bamba)
Priority: 4th
BONUS Move
Swing for the fences and trade Tatum* + Horford + Every pick underneath the sun to New Orleans for Anthony Davis + Nikola Mirotic
*Yes, even with the amount of promise he showed, I trade Tatum for Anthony Davis given the return of an All Star SF in Gordon Hayward.