I'd give up Keiboom (as the main part of a package) to get Starlin Castro and JT Realmuto from the fish. I think Castro is overpaid, but he'd be an improvement over Difo, and Realmuto can be the back up first baseman and rotate there on his off day. Would leave you 41 million to get two starters.
Don't know what it would take to get Sonny Gray, but I would give it a shot. Maybe Wil Crowe and Daniel Johnson.