There's only one team in the NBA I could see taking Josh Smith from Detroit right now.... New York.
Here's my idea:
http://espn.go.com/nba/tradeMachine?tradeId=lqr4efy DET gets: Green, Bass
NYK gets: Smith, Wallace
BOS gets: Amare, Hardaway, Mitchell, Singler, Detroit's 2014 2nd round pick
I'm not sure if Carmelo and Josh Smith are boys, but both are close with Rondo, I believe, so it stands to reason NY would see acquiring Smith as a means to convincing Melo to stay.
This deal also makes it (financially) harder for Rondo to sign with the Knicks in the summer of 2015, if Melo stays there.
I like all the assets we get (except Amare, of course), probably in the order I've listed them. Mitchell could surprise people -- a team that can afford to let him learn on the court can reap his talent. Use the 2nd on an international player to stash, if someone falls (ala Big Baby), or trade it.