I just start the game with my regular tactic. At HT or when its going terribly bad... i look at opposition instructions.
Is there a player having a lot of runs i tend to mark him tightly.
Is there a player who's fitness is below 85% i close him down often & tackle him hard.
Is there a player with a slight injury who can play on i tackle him hard.
Is there a striker being dangerous i close him down, mark him tight, tackle easy & show onto weaker foot.
Just do the things that seem right to yourselves tbh