Thread: Debuff overwriting confirmed to be bugged in English version

Update: This bug has been fixed in the English version as of 1/5/18.

Defense down debuff fails to correctly overwrite weaker debuff of the same type in Kamihime Project R
Wpmz, Dr. SlickFenix^, sanahtlig*

* Corresponding author, Principal investigator
^ No intellectual contribution, and mainly just distracted the others

This research was conducted by the Godtamers Union Research Division.

Introduction: Debuffs failed to overwrite correctly prior to 1/20/17 in the DMM version, resulting in stronger effects failing to apply as expected [1]. Until now, it was unconfirmed (or at least not widely known) whether the problem persisted in the English version, which was launched a month later.

Methods: Nergal's type A DEF down debuff (-10%) was applied, damage from several rounds of normal attacks was recorded, the debuff was overwritten with type A DEF down debuff Ambush (-20%), and several additional rounds of normal attacks were recorded. This was performed with and without a type B -20% ATK/DEF debuff from Amaterasu. The initial experiment was performed on the Fire Disaster (Normal), and the results were replicated on the Thunder Disaster (Normal), and Yatagarasu (Ultimate, boss only) encounters. Encounters were video recorded, damage numbers transcribed into a spreadsheet, and the normal attack damage for all characters before and after Ambush application were compared for a statistically significant difference using Student's t-test.

Results: Ambush failed to provide the expected 10-16% increase to normal attack damage in subsequent rounds predicted by Sanahtlig's Kamihime Project Toolbox Damage Calculator. Intriguingly, it appeared to increase normal attack damage in the SAME ROUND it was applied, but this bonus did not carry over to subsequent rounds, suggesting a strange system glitch rather than a design oversight.

Results spreadsheet with video links



Conclusion: Weak debuffs should not be applied when a stronger debuff of the same type is available, or will soon be available. The weak debuff should be applied afterwards instead (resulting in a 'miss'), or saved in case the stronger debuff misses. This experiment only tests a specific set of conditions, but since it replicates a known issue in the DMM version, a general defect in debuff overwriting should be assumed. Mordred-users in particular should pay attention to the order of debuff application, as the type B ATK/DEF applied by Outrage is the weakest of its type.

Moreover, a user has reported that Regen doesn't update either, implying that stronger buffs may also fail to replace weaker buffs.