I have checked the detailed information about Inter's matches throughout the season. And I saw that Inter used 3-5-2 flat formation like all the time. I don't think this would be a good idea against a team like Manchester City. Because by using this formation you must be ready to deal with fast attacks from the wings as well. Manchester City have just the players for doing that and I wonder how good Inter midfielders can prevent this from happening. Grealish and Silva can penetrate their defense dangerously.
Skriniar is still injured but he is expected to return by tomorrow. He would be fit enough to play in this match in this case. He is a crucial member of Inter defense. If they have him in the match they can rely on their defense more than before. By the way I said these things about the formation they use but on the other hand I don't know if trying out a new formation in a big match like this would be wise.
3-5-2 is common formation which Inzaghi used for this season even i have to say this formation is became an his pattern because i have seen Inzaghi used this formation commontly and i think this formation can be useful for the match against Manchester City because we all know this team has strong midfielder players so if Inter using 5 midfielders they can minimized the movement of Manchester City midfielder such as Kevin De Bruyne or Bernardo Silva
Regarding Skriniar condition i am not sure he will be available for the final match because til today he is still in recovery and indeed since losing Skriniar Inter had poor records but gradually Inzaghi can solved losing this player and Inzaghi has been attempts to playing Francesco Acerbi as Skriniar replacement and seems the results is very satisfying because he can able to performing well to replace Skriniar position
I also think so, now almost every line of Inter players already have almost even quality and performance, so if there are some core players who are absent they can be covered by other players.
Inzaghi has often used a 3-5-2 formation this season but I see it has been quite effective so far and even Inter Milan's performance lately has been very consistent, with a 3-5-2 formation it is possible for them to play defensively and will rely on counterattacks. final match against Man City.
while Manchester City is difficult to predict, they are very strong this season I can even say that this team this season is quite perfect with the quality of the players and the tactics of the coach are quite suitable.
it's difficult for Inter Milan to rival them, but that doesn't mean it's impossible.
I just hope that the final match will be fierce and exciting and even I hope that a million things happen.