I have faith for Milan, but not feel confidence with Roma. I'm not doubting Allegri's competence in coaching Italian team.
On other hand, Roma looks capable enough to compete for the top 4, but not for title race. I've been watching Gasperini whole time at Atalanta, and never recorded good result in Serie a.
So, my prediction for the next season table is that.
1. Napoli
2. Milan
3. Juve
4. Inter
5. Rom
I am unsure and can not understand why you chose AC Milan for a second position after a last terrible season from them. I am really disagree to put both Inter Milan, Juventus and AS Roma under AC Milan that are not stronger than all these competitors.
I don't think AS Roma will be able to finish at a second position too but both Inter Milan, Roma and Juventus will likely stay above AC Milan in Serie A ranking table at the next season ending. AC Milan with their crisis will need more than one season to return strongly especially they are going to lose many star players.
We might have different views on which teams will finish second, third, and so on next season. However, I think many people will agree about Napoli, they seem capable of retaining the Scudetto. AC Milan has undergone a change in managerial position, and they are also trying to revamp their squad. The loss of Tijjani Reijnders is the biggest loss, and overall, they'll need a long period of adaptation before finding their best form. What I'm curious about is AS Roma, how they will perform next season after appointing Gasperini. Actually, Atalanta can't be ignored either, they've performed well over the past three seasons.