Ancelotti may apply a new match strategy in this match. In this match, the main goal of Madrid's defenders must be to resist Haaland. If the Madrid defenders are able to resist Haaland, then the Madrid players may be able to control the match. It is an advantage for Madrid that the first leg is their home match. Madrid's players will be more confident at home. To beat a big team like Manchester City, the players must be confident. Otherwise it will not be possible to win against City.
Ancelotti does not only need a new strategy, but the fitness of his players is also needed by Ancelotti because until now there are five Real Madrid players who are still injured and three of them are core players who are very often used by Ancelotti in every match. So the fitness of these players is really needed at this time, especially core players like Benzema, Modric and Vinicius because in the near future Real Madrid will also be playing in the Copa Del Rey Final apart from having to continue preparing himself to face Manchester City in the semifinals of the Champions League this season.
That's why I said, that the situation that happened to the Madrid camp was not very pleasant. ahead of the Copa del Rey cup match, several Madrid players will be absent in the match namely, Luca Modric, David Alaba, who was hit by an injury. plus, Asensio's status is doubtful because it looks like he was having problems when Madrid played against Real Sociedad. So, like it or not, Don Carlo had to play the available players. what is certain, Kroos, Tchouameni, Ceballos, will be played again in the Copa del Rey final. or Kroos rested, Valverde will play instead. Vini Jr, Benzema again became the main starter. well, if the scenario is Madrid able to score goals in the first half with lots of goals. then Don Carlo will pull some of his core players to save energy. even then, if the scenario goes according to plan.
Referring to what you said, to be honest I doubt if Carlo ancelotti will adopt a new strategy. whether it's the final match of the Copa del Rey, or in the semifinals of the Champions League. because, he tried it once and it failed miserably against Barcelona. so Don Carlo's priority is to maintain the fitness of his players. because, it seems like he doesn't have much choice.
As for City, they will also be preoccupied with a busy schedule. however City were luckier, as several second-tier players had qualities that were quite on par with the first team.