Theory crafting making non-Toxing Rain tank

Hi, since the release of the new tree it became possible to reach 88-90 max res on non-aurastacker characters, through combination of the skill tree and auras or uniques like Grey Spire, Saffelis Frame or Brass Dome. We can further abuse that through Nebulis to get up to 300% inc Lightning/Cold Damage(per Nebulis and we can wield two)
I've been trying to gather char to take uber-endgame content(30 way Simulacrum, Feared etc) with it for some time and its the best that i could gather.
It's still a draft but it's possible
So pros

1. 1.5 mln dps per brand
2. 93 k elemental ehp without molten shell
3. 6 k life 2.5 k es
4. 88% max res
5. relatively cheap, something around 20 ex
   Cons
6. No significant room for upgrades - you can probably change ammy for one with +2 for spells, or get the heist ammy with +2-3 max res and either save some skill points or just get more damage/survivability. Can also get armour with +2 for gems. Overall it's no more then 2.5 mln per brand, which is not mindblowing
7. Es recovery is a bitch cause of lovely righteous fire eating most of our regen. We invest more in regen - we lose ehp/damage. Getting es on hit watchers is an option but a pricey one
8. Almost no good options on clusters, meaning changing enduring cry to the small cluster with enduring cry on hit - is again some significant loss.
9. No chaos res. Nuff said, capping chaos res will be a problem
10. Despite some armor and endurance charges physical damage is still a problem
    This build can pretty easy do maven, awakener 8(who cant?), but i have real doubts about 30 way simulacrum and feared, despite safe brand playstyle.
    Maybe im missing something and there is something to be salvaged here? Anyway maybe this pob will give someone some ideas

https://pastebin.com/aa12NwMT