Are the opponents your friend thrash the same ones you meet in the league? Sometimes even weak teams can suddenly perform & minimize the damage.

My advice is to get a good experienced tall GK (192CM +), one excellent DC, MC & if u like wingers get one very good one. That's all you need to build a strong first 11.

Instead of asking wht the best formation is, ask wht tactical formation do you prefer? Wing-based? Central?

If its wing based then try variations of 3-5-2/4-4-2

If its a more central approach then try variatioms of 4-3-3/Narrow diamonds.

Build ur squad arnd d formation you want ur team to play.

Good luck