My point of view: "Dominating in years" does not sound like a pillar to me. Not because it's Elmacca, I think it applies to everyone.
As I see it, being an NT requires 2 main aspects. For the first one, it's enough to check the matches of this season and test the match reading abilities and decision making in the lineup (in my subjective point of view, tide and myself have been leading here overall, not because I'm going for the NT, just how we've been performing with what we have).
And secondly, speaking abilities and diplomacy, not only with the community, but mainly other NTs.
My two cents!