Paul, Ayton
for
Smart, Brogdon, Pritchard, Gallinari
I think that makes sense for both teams. Suns need the depth and Ayton hasn't worked. C's need someone like Paul to provide a steady hand and Ayton has real talent even if he hasn't worked in Phoenix.
Boston post trade
Starters - Paul, Brown, Tatum, Horford, Ayton
Playoff rotation - White, Hauser, Grant, Rob, Taxpayor MLE
Deep bench - Davison, Champagnie, Muscala, Kornet, 35
I'd keep Rob and Ayton for at least 1 season as both are injury prone and Al is old, but would revisit them long term if they didn't work.