Smith LF (2 WAR)
Inciarte CF (3)
Markakis RF (2)
New Player at Third (2)
Oz SS (2)
Swanny 2B (2)
Freeman 1B (4)
New Catcher (2)
Overall from lineup: 19 WAR
Teheran (3)
Wisler (2)
Blair (2)
Folty (2)
Sims (2)
Overall from rotation: 11 WAR
Pen and Bench: 6 WAR
Total: 36 WAR
Team of replacement players is 48 wins
Gets us to 84 wins
Doesn't seem far-fetched to me. None of the assumptions are unrealistic. We have the funds/trade pieces to pick up a catcher, third baseman, 1 or 2 relief pitchers, and 1 or 2 veteran bench players.
We have some fallback options for the starting pitching: Gant, Jenkins, Newcomb.
Rio Ruiz might continue to surprise and be able to fill in at third. This is why someone like Prado who could move to another position if necessary makes a lot of sense as a signing this off-season.