Like in pure domination NiP is obviously best. But if you were to rank teams from their strongest time it would be:
Sorry but Astralis's Is number 1. Not because im a fan of them. But because the scene is muuuch stroner now than back in 2015 And SK never had a big era. And also Astralis is dominating everyone and doesnt care. At fnatic's time there werent any other good teams really other than maybe LDLC. But thats it.