Feedback/Help for SR Occultist

Hey,

I'm currently working on a build I want to play in 3.5. I know it's a little bit early, but I'm mostly pretending to make a build for Delve.

The build is trying to be heavily defensive with focus on slowing enemies and reducing their damage:

Defence
* Temporal Chains
* Enfeeble
* Aspect of the Spider
* CWDT-Immortal Call
* Fortify (Movement Skill)
* Maddening Presence (from Impresence)
* Malediction (Ascendancy)

Offense
* -73% enemy fire resistance
>> -44% Flammability
>> -19% Flammability (curse effectiveness)
>> -10% Fenumus' Shroud (Aspect of the Spider)
* Arcane Surge (Orb of Storms)
* Elemental Overload (Orb of Storms)
* Frenzy Charges (Blood Rage)
* Flame Golem (maybe?)
* Herald of Ash

I've got no Elemental Equilibrium, because GGG said they wanted to change EE in 3.5 so that SR/RF doesn't just get free damage with (almost) no investment. So I'm treating EE as if it was dead for SR (which it probably will be).

I'm mostly satisfied with my build but I feel 640-900k (900k with frenzy charges and 3 spider web stacks and sulfur flask) mob damage might be a little bit too low for endgame bosses?

Anyway. I would be really grateful for any hints at what I could improve :)

PoB: https://pastebin.com/yf4fbgnU