Need clarification on Cast on Critical (CoC)

Hi everyone,

I'm trying to get a clear understanding of how Cast on Critical Strike (CoC) energy generation works in Path of Exile 2.

The skill gem description says:
"Gains 1 Energy per Power of enemies you Critically Hit with Skills, modified by the percentage of the enemy's Ailment Threshold the Critical Hit will deal."

There is a debate about what this actually means:

My understanding:

CoC energy is based purely on Hit Damage (the actual damage that lands on the enemy).

Ailment strength, accumulation, chance (ignite/shock/freeze), or whether elemental ailments are applied does not directly affect the energy gain.

If two skills have the same Hit Damage, they should generate roughly the same amount of energy, regardless of damage type (physical, chaos, or elemental).

The opposing view:

Applying strong elemental ailments gives extra energy bonus.

Physical or chaos damage builds are disadvantaged because they apply fewer ailments.

I believe the 0.1.0d Hotfix supports my view. It changed CoC with the note:
"Cast on Critical Strike now also cares about the Damage of the hit when determining how much energy to gain..."

Additionally, PoE2 uses integer-only calculations with flooring/truncation, which can cause small differences to appear larger when calculating percentages.

When I looked at test data comparing chaos conversion vs cold damage, in brackets where Hit Damage was similar, the energy gained was also very similar. The claimed ~10% difference seems to come mostly from Hit Damage variation and flooring effects.

My questions are:

Does “the percentage of the enemy's Ailment Threshold the Critical Hit will deal” refer to Hit Damage or to the ailment damage/strength applied?

Does ailment strength or accumulation provide any direct bonus or multiplier to CoC energy gain?

Has anyone done clean testing or seen datamined information about this mechanic?

Any clarification, math breakdown, or reliable sources would be greatly appreciated.

Thank you