I use standard 4-4-2 Formation which doesn't have any great adventages, but it also lacks any disandventages so I like it because it is very balanced. However it is countered by some of the formations and you may not score like 10 goals but won't receive 10 of them either. Also I recommend getting players for your desired position, in my case 4 defenders 4 midfielders and 2 strikers.