So the thinking, Celtics get an expiring contract, a veteran shooter and a very promising young center. Next year is a throwaway, you get a real center who plays big to develop and pack the paint. You get off a bunch of money next year with Tobias, and then Klay is only 2 years, while also giving something that you could reclaim. you also get three picks all with some light protections.
The Mavs receive the best player in the trade and AD gets a star wing to play along side with Cooper flagg and eventually hopefully Kyrie. You are a little bummed about giving away a young center like Lively but you take those.
The Pistons get PJ Washington, and throw in one of the protected firsts to Boston. This is a guy who would fit right in and defend. Nets get Naji into their trade exception. you can even throw in a second rounder or 2 just to make it worth their while.