I know, it's a long title so I'll explain.

The idea of the build is stacking as much as possible fire resistance to get 90 max all elemental resistances with the new chieftain nodes. In addition, we will transform the overcapped fire resistance to armour increase using The formless flame helmet (later on maybe the grasping mail mod). Transforming most of the physical damage taken to elemental (lightning coil + watcher eye mod + taste of hate?) and since we will have at least 400K armour, we will be able to stack many trauma stacks for raw physical damage. We can have almost capped block chance using the red nightmare jewel and the new tattoos and maybe even forbidden flash/flame the unbreakable node from jugg to be practically immortal.

Wielding dual replica dreamfeather swords and with the amazing defence layers that we will have, we will be able to basically facetank everything and the damage should be great as well.

This is the POB that I generated. It's pretty endgame with the multistrike, the impossible escape and the watcher's eye so don't mind the damage numbers exactly. However, even without those you can reach 20M easily.

https://pastebin.com/5UaVUV4A

What do you think? Also, what do you think I should level with for this build?