I have 3 formations I play against a ND, depending on my team. I have used 3n-1-4-2 a lot in the past, but got mixed results later on, might have been my team struggling though. The 4-5-1V works better for most of my teams, but still a bad result now and then. I have one acc where I use 3N-2(DMC)-3W-2 with great succes; red arrows on my 2 DMC's. They destroy ND's of even Q or higher even. This however doesnt work AT ALL for all my other teams.

That's the problem with counters I think. Playing to your own strength might be the best counter there is. And I do believe you have to find your counters for each team yourself mostly, as they can be quite different for any team.