Sorry for such a late reply,
I actually saw a test on KI awhile back on this:
High jump hate test - Killing Ifrit - a Final Fantasy community
He seems to claim it's a 50/60% decrease. I think the test you ran is more sound, but the difference is quite large still...
On another note, I haven't really been on much lately - it's been a month-ish since I logged on period. All I see on forums lately is SE related drama, which is sad to see
I'm thinking if nothing happens in the next month (maybe whenever the supposed update is?), I may just ask the others to blow the AV lock mech and see what ppl can collectively come up with (before the game really dies out).
Kaeko

Originally Posted by
Suiram
My friend, nivlakian, and I had been talking recently about High Jump enmity reduction. When I hit 37 DRG I did a brief test just to confirm that there was some reduction, but never nailed down the exact amount. He wanted to retest it precisely once his own DRG hit 37, but since I've been out of town this last week with limited playtime, he went ahead and did it anyway and sent me this PM with the info, which I'm passing along to you now to look over.
Niv was on 72RDM/36DRG, Sydok was on 75RDM/37???. The other stuff like gear and enmity merits are mentioned in the text.

Originally Posted by
nivlakian
So, I tested High Jump with Sydok today.
We used Oil Spills in Garlaige. Although preferable to do things with no gear, i wore AF and yigit hands to raise my defense so it'd do close to 0 damage with phalanx. Sydok had no enmity modifiers except Pumpkin Head II to cancel his 1 enmity merit.
First test:
I pulled with dispel and cast dispel 33 times to cap CE at 10,000. I recast Phalanx then High Jumped which did 3 damage.
Sydok cured me once then cast dispel repeatedly.
After 21 dispels, he momentarily got hate, but it shifted back to me.
He cast dispel again and had hate from then on.
That narrowed my enmity down to between 21 * 320 + 1 (6721) and 22 * 320 + 1 (7041).
From there, I assumed /DRG was -30% hate as a starting point.
----
We used a new slime. I pulled with dispel placing me at 520CE (200 for pull and 320 for dispel). I high jumped and luckily did 0.
520 * 0.7 = 364
Sydok then cast sleepga twice (180 * 2 = 360 CE). We waited for it to wake up. Sydok then cured me for 0. On the 5th time, the slime went for him. He should have had 365 CE at that point.
So, in conclusion, I'm led to believe HJ is -30% CE and I'm satisfied with what we did. I'm willing to test it with you sometime if you'd like to do it cleaner. I didn't feel to bother anyone more than Sydok so I tried to make things work out with just 2 people.