I think NB is currently overperforming only due to select items, like overbuffed Chillwhsiper and evergrowing Ember’s. A lot of top20 builds actually kinda fell off. The top1 Korba is not even in top20 anymore, imo.
The former melee poster boy - RahZin - is now on the steady guard of Nightblade as a poster boy of why the mastery itself isn’t actually op, it’s the itemization. It’s a set for supposedly OP NB that has everything on paper, except hp and somewhat outdated set bonuses, but ends up being mid anyway.
And the strongest DW build is aether Binder, btw.