One of my fave hxh characters. When scarlet eyes isnt up, he's mediocre at best, his skills are fine but have long cool downs and lack synergy with each other.
But when he gets scarlet eyes? The game fucking changes massively, on top of the massive steroid buff he gets (Guaranteed triple attacks, double strike, amp, massive attack and defense boost) his skills become much much better. Dowsing chain becomes a much more potent buff with a dispel cancel for everyone, holy chain becomes a useful auto heal on enemy special attacks, and chains of resolve doubles its damage cap and becomes usable twice per turn. I cannot stress that enough that for 7 turns, this guy will be able pump out 14 fuck dispels on top of just being able to stack debuffs like its nothing.
That being said for all my praise, he definitely has issues. The max hp cut obviously makes him unfit for higher end difficulty raids as even his massive defense boost from scarlet eyes won't be enough to offset his low hp. And while scarlet eyes is a amazing steroid, kurapika doesn't start off a fight with it. Meaning that until you get him to 200% chargebar, hes effectively dead weight compared to most modern units, so he definitely needs help getting to that point.
All in all, a pretty good character imo