His preferred formation is 4-2-3-1. He generally wants a mobile target man up front who can press and run the channels. He loved Jordan Hugill and Ched Evans. Two wide players who stay fairly narrow and get into goalscoring areas whilst also doing their fair share of pressing, and a number 10 who also presses from the front whilst getting some goals too. He wanted our two in midfield to take the ball in deep areas and build from the back and play it through the thirds.
He does ask a lot from his forward players in a pressing, defensive sense whilst also contributing goals and assists, but it's for the benefit of the team. Whenever we played against teams who played out from the back, we absolutely battered them with our press and were extremely dangerous in transition. In League One that might be slightly different, as I'm sure you come up against a lot of teams who are sitting back, rather than trying to play and therefore can be pressed, but I'm sure he will be adaptable.
Generally you'll see the 4-2-3-1 a lot but he isn't afraid of changing it for particular games when he sees something in the opposition that he thinks he can exploit by changing it up.