Damage bypassing 100% of damage is taken from mana before life.

I am playing a build that uses the new Foulborn Mind of the Council to reach 100% of physical and lightning damage taken from mana before life. It also uses Font of Thunder, Divine Flesh and Bound By Destiny (10% of elemental taken as chaos) to reach 100% of fire and cold damage taken as either lightning or chaos. This allow the build to make use of Chaos Inoculation while also using Divine Flesh.
(Character name: DivineInoculation)

The bug that I am encountering is that I will die without running out of mana. It seems (to me) to only happen when the source have damage gained as extra, such as a magic pack of monsters that have extra fire damage. Exploding barrels will also instantly kill the character.

I was really looking forward to playing this new build I made, but I guess I'll just take a break from the game until this is fixed.

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Deathtal#7354 wrote:

I am playing a build that uses the new Foulborn Mind of the Council to reach 100% of physical and lightning damage taken from mana before life.

Due to rounding, you need 101%, not 100%.

I wish I could explain further, but someone better at words would have to explain why. One of those things I gave up trying to remember and had to be reminded of when I asked someone else of your issue.

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blackdeath101#5742 wrote:

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Deathtal#7354 wrote:

I am playing a build that uses the new Foulborn Mind of the Council to reach 100% of physical and lightning damage taken from mana before life.

Due to rounding, you need 101%, not 100%.

I wish I could explain further, but someone better at words would have to explain why. One of those things I gave up trying to remember and had to be reminded of when I asked someone else of your issue.

I was really hoping it wasn't caused by floating-point imprecision. Probably same reason why you needed to reach 101% of damage taken as something else to not get affected by ailments caused by the original damage type, if I remember correctly.

"

Deathtal#7354 wrote:

I was really hoping it wasn't caused by floating-point imprecision. Probably same reason why you needed to reach 101% of damage taken as something else to not get affected by ailments caused by the original damage type, if I remember correctly.

My theory was wrong, I suggested it to someone else and they tried 11 power charges, and still died with es/mana left. So the only theories I have left are either you need 10-11 active power charges (not minimum) due to some weird issue with the boots/amulet. Or the helmet is just bugged and the 30% doesn't work like written.

If you want to follow the other thread or test theories with that OP.
https://www.pathofexile.com/forum/view-thread/3878509

Have you tried with positive fire/cold res?

I tested in std (didnt play league), with normal mind of the council, against merveil (second form) and hailrake in act1 and didnt get oneshot while afk for 10-15min. I tested at negative res (oneshot), 0% res (oneshot), but at positive res I survived and tested: 1%, 8%, 11%, 35%, 54%, 66%. I tried with divine flesh, PoL sublime vision, pol watcher's eye, and with font of thunder and bbd.

reddit post: https://www.reddit.com/r/PathOfExileBuilds/comments/1qagd0e/possible_solution_to_avoid_rounding_issue_with/