[1.2.323] (2) Moar Skill Balancing

So wait... if you using Hurricane on a monster from a distance...

I want to say it's 30% HP. So yea, more or less Hurricane reduces nonboss mobs' HP by 30%. I think something like that would balance UltraStrafe well.

Edit:
From Fiel's KOR Tables

Maxed Mortal Blow:
HP가 30% 이하일 때 20% 확률로 즉사
When HP is below 30% to 20% chance of instant death

When the mob has under 30% HP, there's a 20% chance to insta kill. On large-HP mobs that can take 8+ arrows and only lose 10% or so HP, this would be really useful.
I'm not sure such mobs are common.