Ancelotti won't make the mistake of playing Ramos in midfield again. I'm expecting 4-3-3 with Ronaldo, Bale and Hernandez upfront, James, Isco and Kroos (Illarramendi or Lucas Silva if he's injured) in midfield. No matter what team they put out we should have an advantage in midfield especially with Pogba back.
I'd go with this:
Buffon
Lichtsteiner-Bonucci-Chiellini-Evra
Marchisio-Pirlo-Pogba
Vidal
Tevez-Morata
Doesn't even make sense talking about benching Pirlo because we all know that's not happening. Vidal had arguably his best game of the season in the first leg so I would stick with him at attacking mid for this one. Sturaro and Pereyra could be important from the bench.