Infernalist Pyromantic Pact damage scaling?

So Pyromantic Pact states that you "Take maximum Life and Energy Shield as Fire Damage when Infernal Flame reaches maximum". My question is how (and why) this damage is scaled with the character's Fire damage (spell damage too?) bonuses.

If there was no such scaling, then (assuming you have at least 100 combined life+es) 1% fire resistances would be sufficient to mitigate the self-damage to be non-lethal. However this is not the case, I tested it with 13% resistance (pathetic I know), and I could not survive the damage without expending no less than 5 uses of my life flask, any less would be lethal. Thus, the self-damage must be scaled by some passive bonuses.

So my first question would be "is this intended behaviour?" and my second would be "is this really necessary?".

It seems like a problem barely worth introducing into your build when you are punished for increasing your DPS and the solution (high regen) is difficult to realise and is already required in large amounts for high-stack Demon form, making it unrealistic to spec both ascendancy nodes simultaneously without also taking Mastered Darkness to limit demon form stacks.

No.

And its balanced around players taking action to mitigate it. So you have 75% base, you can get 1% from tree, and 4% more at least from 2 jewel slots, 2% more for every other.

So that 100 hit becomes 25, then 24, 20% etc... Other ways to mitigate it even further with armor and the node on the tree etc. life regen on gear, supports, tree, lots of things you can do to make this

TBH though, I don't think the drawbacks are worth running with how weak the nodes behind it are, if those gets significant buffs it might be worth playing around.

A lot of asc nodes in witch in general in both ascendancies are complete noob traps which is unfortunate. Pyromantic pact, the crit one, and blood mage in general. And from what im seeing in other ascendencies, the risk reward structure of witch, you are doing a good bit of risk for virtually the same reward.

The only good risk reward nodes atm are the life reservation ones in infernalist.

I'm not sure you read my post correctly, I'm aware how mitigation works. I'm saying I'm taking more than 100% of my life + ES in damage despite having positive resistance.

Though thinking about it, perhaps its a strange interaction with the Ghostwrithe chest armour I'm using.

That would do it for sure, unless pyromantic pact cannot kill you but only bring you to 1 life like demon form does, which I guess you tested out lol.

Yeah pact can and will kill you unfortunately, wouldn't be as much of an issue otherwise lol.

So I just tried and this does seem to be a bad interaction with Ghostwrithe and the life conversion to ES, it appears to be double dipping on at least one of life or ES when calculating the damage.

I'll be submitting a bug report I think as there's no way that's intended behaviour.

Okay I realised (thankfully before submitting a bug report) the reason I take so much more damage (as a proportion of my total effective life) with Ghostwrithe is due to an ignite. It appears since my total effective life is higher with Ghostwrithe the damage is of course higher, but at the same time my maximum life is lower so my ailment threshold is lower, thus making the fire hit from filling the infernal flame meter guaranteed to ignite.

Unequipping Ghostwrithe I need to fill the meter twice before I get ignited.

So yeah Ghostwrithe is pretty much a no-no for Pyromantic Pact, unless you have ignite immunity (if its even possible in poe2) or something like Zealot's Oath with a lot of regen.

Did you try a charm with ignite immunity?

Yeah that works of course but I can't rely on always having charges for it... =/