[Build breaking] Heatproofing (25% of armor applies to Fire Damage) doesn't work.

Hello,

I'm playing an Infernalist with Pyromantic Pact, so I have very obvious and clear control over how much fire damage I'm taking, and I am now confident that Heatproofing does not function at all.

I have 7k armor and 1811 life, but I still take ~450 damage from Pyromantic Pact.

I've been wondering why it felt like my armor upgrades weren't doing anything. It's because they aren't.

Pyromantic Pact is no hit damage.

Ah, I clicked this thread thinking this had to do with fireproofing your PC from the CPU heat inducing game crashing issues.

"

Pyromantic Pact is no hit damage.

It's worded like it's a hit and it triggers on-hit effects like damage recoup (I just tested). OP is correct that heatproofing should reduce the damage it deals but it does not. I hope it gets fixed soon :(

Heatproofing with pyromantic pact seems bugged right now. I have 88 fire res and 4166 armour. I take 390 dmg without Heatproofing and 382 with it.
8 dmg mitigation :)
according to wiki i should take at least 33% of damage:

"To prevent one third of damage (33%), you need armour 2.5 times the damage (e.g. 250 armour for 100 damage)"

4155 x 0.25 = 1041 armour for fire dmg
1041 / 390 = 2.67 armour / dmg
390 x 0, 66 = 257 dmg ( but i take 382)

Bump, can confirm. Also tested with my infernalist.
If I had to guess, I assume that instead of the stated 25%, the actual amount that applies is 2.5%, or maybe even 0.25%.

So, after testing a bit more it seems like my above statement was wrong and this is a case of wrong expectations.

Coming from PoE 1 we expect armour to be applied after resistances, thus having to mitigate a much smaller hit and therefore be very effective.

In PoE 2 it seems like both armour and resistance apply at the same time. So when calculating how much the armour mitigates the damage, it calculates with the initial hit (so explicitly without resistances applied).

The result is that for the big Pyromantic pact hits (let's say 3k), having 3k armour does almost nothing, compared to how much it would have done vs a 300hp hit.