I would start resting stars and playing a lot of youth with the guys they might be playing with in Serie A... really, all Juve needs is a result to clinch, plus Napoli getting a result v. Genoa in the last week.
I'd like to see 90 mins of Giovinco, and may as well test Mirante out too. Give Palladino and Marchisio some more experience, perhaps along side Zanetti and Nedved, who will likely see a lot of Serie A time.
Desired Mantova Lineup:
Mirante
Balzaretti-Zebina-Boumsong-Chiellini
Palladino-Zanetti-Marchisio-Nedved
Giovinco-Del Piero
Subs: Marchionni, Bojinov, Bettega
I doubt Buffon will mind getting some time off, especially seeing as he's not sure he'll even be back, and if he's not, Juve has an obligation to see if they have someone in the system who can replace Buffon before shelling out on Amelia, Abbiati, De Sanctis or Frey.