Sorry for my bad english.

Firstly NiP had the 87-0 map streak
Had best player in the world until late 2014 (GeT_RiGhT)
Had 2nd best player in the world until late 2013/early 2014 (f0rest)
Had best entry fragger until 2015 (Friberg)
3 major finals (During era)
1 major title
NiP had longest era (2 Years)
Argument of no competition is stupid because that means that they dominated the teams that were there meaning they were on another level and since most people measure success of an era in amount of dominance NiP would be the best. And also by late 2013 almost every team had left 1.6 and source and NiP were still dominant for another half a year.

Like to see though other people's reasoning on why the era was fnatic or sk.
https://twitter.com/ESLCS/status/998280004298420224