My guess is nobody offers more than JBJ, Groome and Chavis, so I'd start with an offer of Groome, Chavis, Beeks & Haley. Maybe we can add Castillo or HRam to lessen the salary hit. (We could pay some of their salary.) We'd then have to give more...
HRam, JBJ, Groome, Chavis, Beeks and Flores for Stanton.
We'd actually save money in 2018 as HRam and JBJ will make more than Stanton, and we'd save on the luxury tax. This would allow us to get Stanton plus one from JD Martinez or Mustakas and a guy like Duda, Cobb or even Cozart.
I realize the marlins want to cut $25M in 2018, and this does not help, but they could flip JBJ and maybe dump HRam for a partial loss.