Just going to post my usual, however I believe the trade back, now allows Boston to keep Rozier
So sign Griffin in free agency. Then trade Crowder, Smart, and Jackson? for George and Seraphin (include Boston 2018 1st if necessary). Re-sign Amir and Green at vet minimum (if they come back). Sign other vets or rookies to fill out the bench.
PG - Thomas, Rozier
SG - Bradley, Green
SF - George, Brown
PF - Griffin, Johnson, Nader
C - Horford, Seraphin, Zizic
Fill out the Bench with 37 and the veteran or rookie minimum guys. You keep Yabu stashed another year and still have LAL and BKN 18 picks to either add to the team or build for the future
I think that team would be 50/50 against Cleveland and have a decent shot (maybe 30%)against Golden State if it was healthy.