I was having some thoughts about Nen abilities today... they remind me a bit to a MOBA
You have very powerful but slow abilities like Gon's Janken punch. Worthless using it directly as it's easily avoidable, but combine it with some CC errr... I mean Killua's electrical stun or Hisoka's elastic nen trapping someone and you have a excellent combo.
You have "support" abilities like Meleoron's invisible ability or Palm's vision. You have movement abilities like Knov's holes or heavy emission abilities (ADCs?) like Franklin, etc.
Someone make a HxH Moba!
edit: assign a role to HxH characters! example: Uvogin was a tank, Feitan an assassin.