Doryanis prototype/armour/lightning problem

Doryanis prototype chain mail does not protect effectively even with high amounts of armour rendering it quite useless in the late parts of the game which is a shame, because it is kinda interesting body armour. I did some testing with doryanis elite mobs who shoot the lightning ball and explode it with a blast at lvl 64 black chambers. There was no difference in damage between 33% armour and 60%, some people are getting one shot from other mobs even with 15k armour.

Problems might be:

-lightning damage from mobs do too much damage
-Armour scales badly with the conversion to lightning res
-"armour also applies to lightning damage taken from hits" does not count every lightning damage as a hit (if im correct there isnt any lightning DoT in poe 2)

If this is a bug then of course the solution would be to fix it, but if not then other solutions would be to rework the doryanis prototype in some way or do something about the whole armour mitigation or enemy lightning damage.