PoE Scion, Lightning, Aurabot builds

Hi there, this league its been the first time im trying to play a full dedicated support character for a friend using the following: My friend is playing the chain transfigured version of LS with full MF and the only issue we find is that sometimes i get 1 tapped which slows down our farming (less portals to sell, time to reapply auras and run back, carry exposed to dying etc). I can pretty much facetank anything elemental related, but struggling to find ways to scale phys/chaos mitigation further. We have budget to spend on

POB: I played a 4x 3-point voices scion herald stacker build in 3.10. Today I got finished updating her POB for 3.11 changes. I believe this is the best you can do in 3.11 should you be insane enough to min-max aura stacking with % mana reservation jewels in every slot with 3x 3-point voices. This POB has all the gear she acquired in 3.10. Only thing I theorycrafted was the new jewels. Offensive stats (all shaper-dps): Bossing: 21m barrage power siphon shaper-dps (15m without vaal haste) Clear: 6.6m power siphon shaper-dps with awakened cha