IMO Berardi as vice Dybala (sort of). Mandzukic and Zaza for CF.
Lukaku and Cavani type of signing doesn't make too much sense. We'll need Morata's replacement + we'll buy out Cuadrado which is just the beginning. We need a bench DM (Lemina leaves) and a starting AM (Hernanes leaves as well).
That's at least 4 players to be bought and I don't see a 40-50m signing happening in that case.