Strange formations

I already have seen this formation , but i doubt that it gives good results !

I have seen it, and I don't think it's that strange.

Yeah it's fairly common place to have a sweeper, Particuarly in Europe and South America.

This has actually been a more frequent sighting in the last few versions of the game. The problem is that the sweeper/libero role doesn't function properly in the ME (nor did it in the previous version) while regens almost always have to be retrained to be able to play in this position. For these reasons, I wouldn't recommend building teams around types of tactics, not unless you happen to be pursuing a project where you are trying your best to emulate a real-life style of play from past or present in the ME.