Each mission in a flight simulator has its own characteristics, and to complete it successfully, it is important to consider all aspects of the game. I managed to find useful rules on the site https://aviatrix.co.in/how-to-win/rules/ that explain how to use the capabilities of your aircraft and adapt to mission conditions. My advice is to always carefully read the mission description, assess your strengths and choose tactics. Also, do not forget about resource management to avoid problems at critical moments. The better you are prepared, the faster you will complete difficult missions.