Boston probably could have come close if not outright beating the Nets offer without Brown or Tatum. Especially when you consider they could have used the TPE to take on additional salary.
Divert Walker to a team like the Knicks for expiring contracts that go to Houston. Trade Nesmith, Langford, R. Williams, 4 1st's, and 3 swaps. Then using the TPE and some 2nd's take Gordon. That seems like a package that is at least on par with the Nets and then they don't give Harden exactly what he wants.