What the fuck is a 4-2-4? This team is way to offensive and attacking oriented. If Conte insists in not using 4-3-3 , at least play a 4-4-2 with someone like Vargas or Bastos as a LM.
With Krasic, Vucinic,Kun, Matri/Quag having free roles and Pirlo being 32 , the remaining midfielder and the defence would definately struggle.