All we know is that Conte seemingly wants Wingers so we'll assume that we're aiming for a 4-3-3
Tevez either starts out of position or starts at Llorentes expense. I find that more likely than us looking for a 4-2-3-1 where 2 of our best players won't even be in the team, just so Tevez and Llorente can play together.
The problem is we're linked to various strikers and Wingers atm, but no matter who we buy one of our current players will be sacrificed to a different role or even the bench
4-3-3. Tevez or Llorente is sacrificed
4-2-3-1 Pirlo and Marchiso are probably both sacrificed
4-3-1-2 No width, unlikely considering we're after wide players
3-5-2 Won't even work when Pirlo goes, there will be absolutely no creativity in the midfield compared to 90% of the teams we'll face in Europe. Would only work with 2 top wide players coming in, and an upgraded striker or perhaps an expensive attacking mid.