Hi,
First I tested your tactic using F9, but many games my team (I played only with Vasco da Gama) can't score and the result was many draws or lose.
But after make same changes that you wrote in first post (training defense before game, OP instructions, etc) my defenses are very consistent and I winner 2x Campeonato Carioca (little brazilian championship), 2x Brazilian Championship, defeated final of Brazilian Cup and defeated final of Libertadores (like Champions League).
I think that you have a great tactic for 15.3!
I changed only the mentalist, because if my team start with Counter-attack... can't score much goals! Than I change to Attack and if I score one or two goals, I change to Counter-attack...
Congrats!