Melding of the Flesh still not working

i have 84%(143%) fire, 19% cold, -195% lightning, 70% chaos resistances and im using this jewel. i dont get any fire dmg but sometimes i got one shot from lightning dmg. Sometimes harbingers make me feel pain. I hope it will solve soon...

Melding of the Flesh makes your Maximum Resistances (how high your resistance can go before it's capped) the same.

It does not boost your resistances to their Maximum, nor does it allow you to only invest in one type of resistance. You only need to invest in one type of Maximum Resistance with Melding, but you still need to invest in each resistance.

You should invest more into cold resistance. You have almost none.

Since you're using Doryani's Prototype, Melding of the Flesh isn't going to do anything to help you survive lightning damage.