Delpiero should start as a lone striker. We don't have a better finisher at this point. Matri deserves to get benched, so does Pepe.
Buffon,
Licht, Barza, Chiellini, PDC
Vidal, Pirlo, Marchisio,
Elia, ADP, Vucinic,
Yes true pepe does defend well and bla bla, if that's the case we put pepe in, in second half when we winning by two goals. We need creativity upfront. That trio won't be predictable, since all of them can switch sides, and they cause risk from any position.
Do we really need to defend with 10 men vs Atalanta? The only good player they have is Denis, Barza and Chiellini will do their job, so we don't need Pepe. Also Vidal and Marchisio will make up for Pepe's absence, so Vucinic ALex and Elia do their jobs in attack.
It sucks how we call it 4-3-3 while among these 3 in attack two of them sometimes are midfielders, bad ones (Pepe and Esti). Playing 4-3-3 use best attackers. Or we go back to 4-4-2 with proper wingers and two attackers.