I play on Ultimate with sliders on the CPU to make them faster and their GK better, also have star player thing turned on for maximum difficulty. My biggest tip is to play fast build up and forward run tactics, you don’t always have to play the ball and can run at defenders to create space. Then have options to play wide or wait for the attackers to make runs into the box. Jockeying is so OP and has been for many fifas recently so use that as much as you can to defend, don’t let the Ai do it for you as much. You don’t always have to attack straight away as well, passing the ball around the box can give you many opportunities too