There is no "best" formation. There are a lot of formations with useful features. I tend to use 4-4-2 classic as my standard and occasionally alter it. This is because it is a very balanced formation that is hard to counter. Others prefer more flexible formation that can be easily switched to various other ones during a match.
FC Bristbury
Season 5, Level 5
League Winners Levels: 1, 2, 3 & 4
Champions League Winners Levels 2 & 3
Double X 2 (League and Champions League), Levels: 2 & 3
Murray to win Wimbledon!
How do I use best 3w-4-1-2?
I don't know - I've never used that formation - hopefully someone else will comment here. Skidz?
FC Bristbury
Season 5, Level 5
League Winners Levels: 1, 2, 3 & 4
Champions League Winners Levels 2 & 3
Double X 2 (League and Champions League), Levels: 2 & 3
Murray to win Wimbledon!