Amazing stuff.
I only use it as a 4-2-3-1 with both CD in defence and both CM as Defence or Support depending wich is the stronger in each player (never use an atacking role in MC spot). These are the only rules i follow.
Every role is the strongest of the player chosen i just follow the upper indications in the mentality.
Once they get into it its a joy to watch with unbeliavabl results.