Map Modifier - Monsters deal #% damage as extra elemental damage

I feel that the map modifier where Monsters deal #% Damage as extra elemental damage is way overtuned. Rather than it giving, for example, 36% extra lightning damage, it feels as if it's actually 360% lightning dmg. I'm res capped at 75% all elemental res and 80% physical damage reduction but I'm getting shot by white mobs whether it's lightning, fire, or cold dmg.

Whereas the map modifier where Monsters Gain 36% more damage and armor break, the monsters don't one shot me still and I can just run through without worrying. Warriors need some way to negate elemental damage.