As I posted elsewhere, I think something like this makes sense for both teams
Walker, Thompson
for
Porzingis, Burke
That trade seems to make sense for both squads. I might even throw in the Boston 1st this year as additional incentive. Trade drops salary and provides a better fitting roster. And KP, while injury prone, fits the skills set and timeline of the J's a lot better than Walker does.
Starters - Smart, Brown, Tatum, Porzingis, Williams
Rotation - Pritchard, Burke, Fournier, Williams, Nesmith, Langford, Parker
Deep Bench - Kornet, Ojeleye, Edwards
I think that team has more top end potential both in the short term and long term. And the salary drop from Kemba/TT to KP/Burke makes re-signing Fournier a lot easier (still a tax team, but not devastatingly high).