3.26 theory craft

So
I've been theory crafting in POB a bit and managed a resonnable 1.5m/3.0m DPS with fairly cheap gear.
I'm currently trying to optimize the defensive aspect of it, but I'm ending up flat with maxed rez and nothing else

I'm planning to play Blight content with Tornado since they should be able to clear without too much active control.

IMPORTANT: I'm planning to use the Elementalist ascendancy with Herald stacking and 4 Golems for defense + offense boost
Chaos res and INcrease defense sounds useful

POB has over reserved and is lacking stats since it is still using the 3.25 data. I'm mostly looking for some help in gearing/passive changes to help optimize some aspect for early game/mid game