User blog comment:Jojo-a-gogo/How far do you think Zushi has progressed in his nen training?/@comment-112.204.138.201-20121014044959

I personally think that Zushi has made progress in his Hatsu, more or less the same level with Gon and Killua during the Greed Island Arc. He's Manipulation might be attributed along with his martial arts maybe by incorporating elemental manipulation.