Mind over Matter and oneshots

Hi there!
I play Sorc with 8k Energy Shield, 1.4k mana, Mind over Matter and Chaos Inoculation. Rare monsters with modifier "Siphons Mana and Deals Lightning Damage" start to kill me after burning all mana, ignoring energy shield. I assumed that this can be something like a Kryptonite for MOM builds, so today I refund a passive node "Mind over Matter" to properly test this. After it I start getting one-shots from white regular monsters BC damage now completely ignoring Energy Shield.

What can I do to it?

I refunded Chaos Inoculation to make sure that Energy Shield still works, get CI back and still getting one-shot from white mob physical attack.

If you need - I will provide more details or make a video with it. Looking for help, BC just can't play with this character =(

So, my Giga Chad friend ask me couple of questions and figure this out.
I'm using "Heavy Buffer" node that allow 5% of damage to bypass energy shield - so this was a flaw in my build. Huge thanks to Greshnickk! <3