Any tips and an question?

[Axe Mire]

Hello all!

I need some tips on my formation, And I have an question if my formation is legal since I don't really get the legal and illegal formations,

Now this is my formation (I'm level 1 by the way)



Aanvallend is Attacking ;p

So I really need some tips because of what is told to me is that I have like 20% something because of my illegal formation?
I really need some tips on this.

Thank you for reading