Best I could come up with that I think would work for both teams
Howard, Peace, Blake
for
Rondo, Green, Bass, Sullinger, Barbosa, Collins
Boston post trade
Guards - Bradley, Lee, Terry, Blake
Wings - Pierce, Peace
Bigs - Garnett, Howard, Wilcox, Melo
C's clearly would need to add a big man free agent. A guy like Kenyon Martin would make a lot more sense. Add him to those guys and I think that is a team that could legitimately compete with the Heat if Howard was healthy.