Diamanti as attacking winger and de ceglie as very very last option of a centre back but it would rarely happen because there is ogbonna.
Diamanti as attacking winger doesn't work, it's like putting Pirlo as 'defending striker'. He's just not that type of player.
Playing Buffon as CB is not much worse than playing DC as CB. De Ceglie is a horrible defender, his only good qualities are going forward. Mostly his crosses.
This is what we should be doing (imo)
GK: Buffon, Storari
RWB: Licht, Isla, Pepe
CB: Chiellini, Barzagli, Bonucci, Ogbonna, Caceres (LWB also)
LWB: Asamoah, Peluso
CM: Pirlo, Vidal, Marchisio, Pogba, Padoin, Giaccherini
SS: Tevez, Vucinic
ST: Llorente, Quagliarella, (Higuain?)
Buffon
Barzagli-Bonucci-Chiellini
Licht-Vidal-Pirlo-Pogba-Asamoah
Tevez-Llorente