In 3 seasons with Bari, Atalanta, and Siena he just once used a system rather than his 4-2-2-2 . It was Atalanta-Inter game and he played with 4-1-4-1 and it finished 1-1.
42 games with Siena this season, 30 Games with 4-2-4 and 12 with 4-4-2 which basically are not different, just more...