Celtics trade future picks Avery Bradley and Jae Crowder for Butler. if this is the case, then Blake Griffin makes more sense for this roster. Yes, there is more risk due to injury history, but Ainge is a gambler. If win now is the thought, then its Blake.
I would draft Tatum and keep him and use future picks for Butler.
IT4
Jaylen Brown
Jimmy Butler
Blake Griffin
Al Horford
Terry Rozier
Marcus Smart
Jayson Tatum
Abdel Nadar
Guerschon Yabusele
Ante Zizc
Vet Min
Mid level exception
2nd rounders