I can see what Allegri would do with our current squad.
Eriksen (Perisic) - Lautaro (Sanchez) - Lukaku (Candreva)
Sensi (Gagliardini) - Tonali (Brozovic) - Barella (Vecino)
Bastoni (Young) - De Vrij (Ranocchia) - Godin (Skriniar) - Hakimi (D'Ambrosio)
The formation would vary between a 442, 433, and 4312. Like it could be Eriksen behind LuLa, or at times more of a winger oriented 433 with Perisic (and occasionally Candreva). Lukaku won't play as a winger but his role would vary, in terms of how much they want him to drift on the right side. The formation is irrelevant, and the roles would depend based on the game. I would also like to see Eriksen and Sensi combining on the left side, with both having the potential to cut in and shoot, do 1-2s with Lautaro, and also create space for Bastoni to deliver his crosses. Hakimi of course gets a free run on the right side.
We've seen both the Madrid clubs employ such strategies, with a 4-man midfield without pure wingers. Isco plays that floating role, which Eriksen or Sensi could for us.
I do like what I see above. Of course, it has to have other midfielders instead of Gagliardini and Vecino.