Ok what about this idea with Chicago:
S/T Sully, Rozier, Amir, Brooklyn 2018, Boston 2018, Boston 2019
for
Butler, Gibson, Dunlevy
OR the same deal where the celtics sub in Jerbeko for Amir and the Bulls remove Dunlevy
Sully (S/T), Rozier, Jerbeko, BKN 2018, BOS 2018, BOS 2019
for
Butler and Taj Gibson
It depends on what the Bulls would be wanting to pay Sully and/or what Sully's agent thinks he's worth. The deal with Amir gets Sully a contract at about $14-Mil annually, and the Jerbeko deal gets him a little over $17 Mil.
The Bulls give up Butler, and Gibson who they likely don't want to pay anyway, but they get a boatload of rebuilding blocks.