To make everything go according to what is expected, they must look for an early goal after the match starts. They must be able to take advantage of the opponent's situation which will certainly be a little disturbed by the atmosphere created by their supporters in the stadium. At least that is one thing that can be done, because when playing away, usually the opponent will start with a little nervousness. We also know that AC Milan has a militant fan base too, so they can take advantage of that moment. Preparation must also be mature, they must also have several strategies that can be used in difficult situations.
An early goal will be the best strategy for Milan, because if they score early, they will immediately balance the scoreline and it will be left for both teams to put their strength and skills to see who wins the game. However, Milan might win their visitors hands down without any problems, but a lot needs to be done because Milan will not play with a relaxed mind.
AC Milan will start the match with a little bit of nervous feeling, but I hope they can overcome that and not think about their previous deficit. As I said before, an early goal will give them the upper hand and they can turn things around. But on the other hand, their opponents will also anticipate that, because they must be very aware that their opponents have the ability to do that. So in the first 15 minutes they will try to increase their concentration as quickly as possible, because usually the early minutes are a crucial time for concentration.