Marlins are the trade target, imo. I've been bringing up Nardi since the deadline last year. They've got 3 potential SP's to trade for to go with him in Alcantara, Cabrera, and Luzardo. I really dont want to target another lefty like Luzardo to stick in the rotation, so I would prefer Alcantara or Cabrera, with Cabrera being the more likely to be available, though Alcantara's actual money owed balloons up to $17M this year and for a team like the Marlins that could be an issue.
So trade for Alcantara/Cabrera + Nardi, sign Grichuk as the bench bat, roll with whatever infield fodder you want, and sign a catcher or trade for someone like Fermin from the Royals.
Still not in love with the overall team and wouldn't consider them favorites for anything. but that's about best case from my viewpoint.