Anything that suits his team, the squad of players he has. It is a complete myth he plays some dead, all-out-defense football. He averaged more goals per game at Juve than SAF did at United or Poch at Tottenham.
We changed literally every year and he changed how we played.
First year was a narrow 4312 with 4 classic midfielders, lots of possession, moving the ball around etc.
Second year tried that again, was awful, changed back to 352 then to 451 and struck teams on counter attacks.
https://www.youtube.com/watch?v=1t99oVhQ6N8
Third year tried again with 352, was awful, changed to 4231 with 4 attackers, Pjanić and Khedira in midfield. Mix of both seasons before. Lots of possession and deadly counter attacks.
Fourth year was a mix of both 433 and 4231, highest scoring in history of Juventus.
Fifth year was the most pragmatic one. Left with an awful midfield and Ronaldo upfront, slowed down the passing game a lot, maybe too much, tortured teams with sheer quality and crosses to Mandžukić and Ronaldo