Here is a simple tactic that I created while playing with Manchester United (I don't know if it's because of team, but it has been working wonders for me)
The tactic consists in ball possession and goal scoring
OI's, training and all of that stuff I leave all to my Assistant Coach (Mauro...
I'm playing with FC Internazionale and he has been a complete monster. He is a Goal Scoring Machine, I'm using him sometimes as an Advanced Forward and Fake 9, and using the tactic FourTwoFour and 4-2-3-1 goal.