I've started a new game with every tactic I've tested, and the only that has given me results for more than a year has been tactic of MiyaGi. I took to Stuttgart in December, 18th place, and ended up in 5th place. The second year I was in 2nd place and won the cup. 3rd year won the league, cup and Champions arrived until semifinals, eliminated by Real Madrid... The other popular tactics (4 stars), I wouldn't recommend any. There are two "master tacticians" who have spent years getting good tactics, and are always the first to use, but this year they haven't hit the bull's eye, if not, I recommended you too.