anyway to get success you have to buy and try players if they fit to your team... some times you have to change for example striker 3 or for times (sell and buy a new one) to get a team that works... check the statistics, if players get 6-7-6-7-7 or less you should change them... if player should get average of 7,5 so a history of 7-6-9-8-8 or so to be satisfied. Strikers and AMC´s should make a goal every second game or 1 to 3 minimum. AMC and MC´s should pass a lot and be on the rankings in the league at the top or buy new ones... AMC should have goal/pass ratio about 50/50 and MC´s about 25/75 and Strikers the other way 75/25... the tactic you should keep constant, because if you find the (perfect) players don´t mess it up changing the tactic... you can change other things like counter attack, passing, trap etc. while the game is on...