Who is the strongest person now after Cursebeard died?

[razaral]

Can weapon and fighting style users get as strong as curse and magic users?

aura is just the name of the technique used when someone imbues trace amounts of magic energy into their attacks to make them more powerful, the boxing mentor explains it better its more common to be born without it, but most that do tend to learn how on their own at a young age, so yeah all the town npcs you see likely dont have magic

If it was for only demigods, then vetex would say so. Aura tracing is common in the world, considering even the boxing mentor knows about it