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Possible bug with Agility in 2.1.3
Asayre
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In the PTS 2.1.3 I discovered a bug with Agility that I'll describe in detail below. In essence, the weapon damage increase from the Agility passive in the Medium Armour skill line results in a change in the weapon damage on the character sheet and a change in the abilities tooltip value however the actual damage dealt does not reflect this. I don't play a stamina build often so am unlikely to continue checking if this has been fixed. I submitted a bug report when I found out about this roughly 1-2 weeks ago but I didn't see a mention of it in the official patch notes nor http://forums.elderscrollsonline.com/en/discussion/212064/known-issues-for-patch-v2-1-4-imperial-city#latest
I hope that by explaining this bug someone more focused on stamina builds will remind ZOS of the problem and check to see if it is ever fixed and also that more people can check my calculations. Now onto the details of the bug.
The testing is done in Cyrodiil and with the aid of Foundry Tactical Combat. The attacker is equipped with 4 pieces of the Armour Breaker set and a 2H axe. In fact any medium armour will work, it's just what I had handy. All equipment is V16 and legendary. The weapon damage shown in the character sheet is 1700 (=1571 (2H axe) + 129 (Shield Breaker 4 piece)). Attacker's stamina pool is 11849. The tooltip value for Wrecking Blow is 4567. Attacker's focus is 100 (base focus). Target has 18552 physical resists. The actual damage recorded is 1645. This is in line with expectations because damage in Cyrodiil is halved and the mitigation provided by the target's resistance is 27.95% ( (18552-100)/660 ). Thus the calculated damage is
4567 [Tooltip] * 0.5 [Battle Spirit] * (1-0.2795) [Physical resistance] = 1645 [Calculated damage]
Calculated tooltip 4568
When an extra piece of Armour Breaker is equipped, the weapon damage on the character sheet is increased to 1904 (=1700*1.12). This correctly reflects the 12% increase in weapon damage due to the Agility passive. Attacker's stamina pool has also increased to 12270. The Wrecking Blow tooltip now reads 4960. Using the same calculation as above, we expected
4960 [Tooltip] * 0.5 [Battle Spirit] * (1-0.2795) [Physical resistance] = 1786 [Calculated damage]
But the actual damage recorded is only 1669.
I've verified that the tooltip value of Wrecking blow accurately reflects the increased weapon damage. From previous testing without ever using 5 pieces of medium armour I found that the tooltip value of Wrecking blow is
Wrecking blow tooltip value = 0.154 * ( Stamina + 10.48 * Weapon Damage)
In the first case with only 4 pieces of Medium Armour the calculated Wrecking Blow tooltip is 4568 while in the second case it is calculated to be 4962. Both these values match favourably with the actual tooltip value.
So to reiterate, the Agility passive in the Medium Armour skill line correctly increases weapon damage by 12% and this change is reflected in the tooltip value for a skill however the actual damage dealt does not reflect this.
Edited by Asayre on September 1, 2015 6:11PM I hope that by explaining this bug someone more focused on stamina builds will remind ZOS of the problem and check to see if it is ever fixed and also that more people can check my calculations. Now onto the details of the bug.
The testing is done in Cyrodiil and with the aid of Foundry Tactical Combat. The attacker is equipped with 4 pieces of the Armour Breaker set and a 2H axe. In fact any medium armour will work, it's just what I had handy. All equipment is V16 and legendary. The weapon damage shown in the character sheet is 1700 (=1571 (2H axe) + 129 (Shield Breaker 4 piece)). Attacker's stamina pool is 11849. The tooltip value for Wrecking Blow is 4567. Attacker's focus is 100 (base focus). Target has 18552 physical resists. The actual damage recorded is 1645. This is in line with expectations because damage in Cyrodiil is halved and the mitigation provided by the target's resistance is 27.95% ( (18552-100)/660 ). Thus the calculated damage is
4567 [Tooltip] * 0.5 [Battle Spirit] * (1-0.2795) [Physical resistance] = 1645 [Calculated damage]
Calculated tooltip 4568
When an extra piece of Armour Breaker is equipped, the weapon damage on the character sheet is increased to 1904 (=1700*1.12). This correctly reflects the 12% increase in weapon damage due to the Agility passive. Attacker's stamina pool has also increased to 12270. The Wrecking Blow tooltip now reads 4960. Using the same calculation as above, we expected
4960 [Tooltip] * 0.5 [Battle Spirit] * (1-0.2795) [Physical resistance] = 1786 [Calculated damage]
But the actual damage recorded is only 1669.
I've verified that the tooltip value of Wrecking blow accurately reflects the increased weapon damage. From previous testing without ever using 5 pieces of medium armour I found that the tooltip value of Wrecking blow is
Wrecking blow tooltip value = 0.154 * ( Stamina + 10.48 * Weapon Damage)
In the first case with only 4 pieces of Medium Armour the calculated Wrecking Blow tooltip is 4568 while in the second case it is calculated to be 4962. Both these values match favourably with the actual tooltip value.
So to reiterate, the Agility passive in the Medium Armour skill line correctly increases weapon damage by 12% and this change is reflected in the tooltip value for a skill however the actual damage dealt does not reflect this.
Reference for any calculation I make Introduction to PvE Damage Calculation
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