Upheaval dealing more damage than expected when in Defiance

Thread Title:
Upheaval dealing more damage than expected when in Defiance, the damage values seen are about 40% higher than expected values.

Has been reported in-game since more than half a year ago and issue has not been pushed forward.

ISP:
N/A

Type of Internet Connection:
N/A

Internet Connection Speed:
N/A

Date & Time:
First tests 25/02/2018
Re-tested 18/08/2018

Frequency:
Always

World:
All worlds

Character Name:
Any character with warrior 64 and above
Tested and reported in-game approximately 6 months ago by:
-Mox Xinmagar (Ragnarok)
-U'tyada Tia (Odin)
-Emiin Vanih (Lamia)

Retainer Name:
None

NPC Name:
None

Monster Name:
All

Class/Level:
Warrior 64 and above.

Party or Solo:
Both

Race:
All

In-Game Time:
See date & time

Area and Coordinates:
All areas with a target to attack

Housing:
All with a dummy

Steps:
Document the damage Upheaval does with a broken Lv1 Weathered Axe to minimize the variance.
https://cdn.discordapp.com/attachmen...45/unknown.png picture of results.

Conclusion:
Upheaval's math has some very big hiccups.
https://i.imgur.com/BEUTwfN.png

Defiance might be 1.2x1.25 instead of 0.2+1.25 - picture above has possible formulas to achieve the observed results.
Deliverance's +5% bonus not accounted for to keep it simple.