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The most up-to-date conclusions can be found @ post 111
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I've been running some Tachi: Gekko attack bonus tests lately, and I think I have found out some interesting results that I wish to share. I'm sorry if I'm not as good as Kaeko/Rukenshin at laying tests out, but I did my best. Feel free to correct any mistakes and give feedback.
PART #1
Goal of the first test is to find out the new pDIF cap.
Target:
WW Mobs.
My stats:
With Soboro: Base Damage = WD + fSTR = 40 + 12 = 52
With Ushikirimaru: Base Damage = WD + fSTR = 82 + 17 = 99
Formula:
pDIF = DMG / Base Damage
Results:
Soboro:
Lowest hit: 99 = 1,903 pDIF
Highest hit: 140 = 2,692 pDIF
Ushi:
Lowest hit: 192 = 1,939 pDIF
Highest hit: 269 = 2,717 pDIF
capped pDIF now seems to fluctuate between 1,900 and 2,700 (results for Ushikirimaru are a bit off, I suspect that the real Base Damage for Ushi is somehow 100, but it doesn't matter).
I did the same test for WS damage and capped pDIF came out to be 1,9~2,7 for Weapon Skills too.
PART #2
Goal of this test is to find out pDIF during Gekko, Yukikaze and Kasha WSs.
Target:
Steelshell LV 73~75
DEF: 354, 360, 366
My stats:
Attack: 403
STR: 114
Overwhelm LV1
Base Damage (Soboro) = Weapon Damage + fSTR = 40 + 6 = 46
WSC: 114 * 0.75 * 0.83 = 70
ATK/DEF = 403 / 360 = ~1,12
Formula:
pDIF = DMG / Overwhelm DMG Bonus / fTP / (Base Damage + WSC)
WS pDIF = Average between Highest pDIF and Lowest.
Attack Bonus = WS pDIF / (ATK/DEF)
Results:
Lowest Gekko: TP 108 DMG 363
pDIF = 363 / 1.05 / ~1.58 / 116 = ~1,9
Highest Gekko: TP 129 DMG 530
pDIF = 530 / 1.05 / ~1.65 / 116 = ~2,65
Lowest Yukikaze: TP 108 DMG 226
pDIF = ~1,1
Highest Yukikaze: TP 104 DMG 363
pDIF = ~1,9
Lowest Kasha: TP 126 DMG 255
pDIF = ~1,3
Highest Kasha: TP 108 DMG 411
pDIF = ~2,1
pDIF seems to be capped for Gekko, while it is not for Kasha and Yukikaze.
Yukikaze:
Attack bonus = WS pDIF / (ATK/DEF) = 1,5 / 1,12 = ~1,33 (+33%)
Kasha:
Attack bonus = WS pDIF / (ATK/DEF) = 1,7 / 1,12 = ~1,51 (+50%)
Gekko:
Attack bonus = WS pDIF / (ATK/DEF) = 2,3 / 1,12 = ~2,05 (+100%), at least, since pDIF appears to be capped.
Damage for YGK is the same only if +33% attack bonus is enough to be capped on pDIF?
PART #3
Goal of this test is to find out the attack bonus for Gekko WS.
Target:
Steelshell LV 73~75 during Scissor Guard
DEF (doubled): 708, 720, 732
My stats:
Attack: 501
STR: 108
Overwhelm LV3
Base Damage (Soboro) = Weapon Damage + fSTR = 40 + 4 = 44
WSC: 108 * 0.75 * 0.83 = 67
ATK/DEF = 501 / 720 = ~0,7
Formula:
pDIF = DMG / Overwhelm DMG Bonus / fTP / (Base Damage + WSC)
Attack Bonus = WS pDIF / (ATK/DEF)
Results:
Lowest Gekko: TP 100 DMG 202
pDIF = ~1,0
Highest Gekko: TP 138 DMG 383
pDIF = ~1,8
Attack bonus = WS pDIF / (ATK/DEF) = 1,4 / 0,7 = ~2,0 (+100%)
Attack calculated for Gekko seems to be exactly doubled.
PART #4
Goal of this last test is to find out if the Attack gets capped at 999, and if the attack bonus is really +100% and not just a straight +400/500 attack.
Target:
Again Steelshells during Scissor Guard.
My stats:
Attack: 627
STR: 108
Overwhelm LV3
Base Damage (Soboro) = Weapon Damage + fSTR = 40 + 4 = 44
WSC: 108 * 0.75 * 0.83 = 67
ATK/DEF = 627 / 720 = ~0,87
Formula:
pDIF = DMG / Overwhelm DMG Bonus / fTP / (Base Damage + WSC)
Attack Bonus = WS pDIF / (ATK/DEF)
Results:
Lowest Gekko: TP 133 DMG 284
pDIF = ~1,35
Highest Gekko: TP 129 DMG 439
pDIF = ~2,10
WS pDIF = ~1,72
Attack = Defense * WS pDIF = 720 * ~1,72 = ~1250 = ~ (627 x 2).
Attack is definitely doubled, and is not capped at 999.