Well hun I only just qualify as experienced lol (think you should have gone higher say level 10 ) but !!!!

I tend to stay around a 4-4-2- either classic or narrow diamond, as thats what suits my better players, for position etc. I do change to counter a better quality team or to sometimes to accomodate injuries etc .

but the fun is in experimenting there is no magic formation hun thats for sure !!!!!!!