Advices for tactics

[Arion]

4-1-2-1-2 Narrow Diamond is recommended 9 times as a counter. But there is no counter listed for it. Is it unbeatable?

Of course not. I've not played or seen someone play it for ages, but 4-5-1v is a fortress. It can beat ND if you play CA.
Against narrow formations, it's the fullbacks that do the most damage. Taking 4-5-1v vs ND, the 2ST, AMC and 2MC are marked by the 2DC, DMC and 2MC respectively. Your wingers and ST are marked, yes, but he has the DMC and a DC free. In this case, the fullbacks can go to attack and cross into the box freely.

Just watch some football on TV, then you can figure out the tactics for yourself.