Bro, I played about 20 games so far with 10 different tactics, every single one sucked or it's not constant. I use default setup for defenders, DL and DR are full backs or wing backs, one DC is ball playing - defend, and other is central defender - defend. It's very important for all to have the same mentality.
Now I'm trying to fix 4-1-2-1-2, but there's no room for Krasic, so I'll have to make either 4-3-3 or 4-2-3-1 pretty soon.