I agree with most people here. NR can be countered. I admit I have my difficulties too, but I won a few matches against NR. You just have to watch out not to fall for the trap. Obviously it also depends on your card draw, but the main strat is to either win 1st round and force them to play their super-combo second round (enabling you to potentially win round 3) or to force them to actually play most of their cards 1st round. Or to scorch, or to weather, or to try to use your own strategy getting up there. I actually like the buffs of NR, since it allows you to easily set up your own cards with HUGE numbers (commanders horn, other buffs) while still not being scorch-able. Debuffs can also help defeat NR.
If anything I realizes a lot of the decks require completely different approaches.
NR you have to win the early round(s) and try to eliminate the "super-buff".
Skellige you have to win early too and reduce graveyard play as best as you can. (Try to win the game in 2 rounds. The longer the game, the stronger Skellige gets).
Scoia'teal requires a lot of debuffing as well as trying to eliminate the units that stay at the end of each round. Weather cards are useless against them (mostly), since they can choose rows.
Epidemic can be strong against monsters. As can torrential rain (if they have a lot of siege units, but that is depending on the deck...) and clear weather. Card wounding is also a big thing against monsters, as is scorch. Monsters are the extreme. They have many very weak muster cards and very strong single-unit cards, which makes them very vulnerable. Weather helps them a lot but also makes them weak against clearing weather. The key is to interrupt their muster chain and eliminate copies of the same cards so they can't mass-buff while debuffing you with weather.