Arrow Storm is an AoE that does equal damage in a 5x5 cell (400% Attack to all foes). Cross Impact is a Guillotine Cross improved version of Sonic Blow (without the stun, though).
I have 275Hit

I attacked another Nine Tail just to be sure it wasn't me, and I hit that one at 100% and killed it in about 1sec (187ASPD). I'm level 129, Ranger, and confused.
Noting this happened a couple times so far on several servers; I always think it's a GM who's messing with me, but the thing attacks me, misses me, and doesn't move as if it's controled by a human's computer mouse. It absolutely will not be hit by anything but Neutral; I didn't bring Neutral arrows with me so it's a good thing my friend could take off his Katar to get rid of the element and hit it with Neutral.
The weird thing is: I got it down to 13%HP with Arrow Storm, but after that, it just stopped hitting o0 It could hit me but we couldn't hit it.
P.S. My friend has 189Hit, but after using Cross Impact / Sonic Blow / normal attack (Poison Element) several times, and me using DS, Arrow Storm, and normal attacks (Water Element), it would get hit at least once without fail. That's inevitable. Once he changed to Neutral, he hit at 100%; I really don't get that.