Thoughts on this PoB? High mitigation/high regen armorstacker jugg (shield crush crit)

https://pastebin.com/hfDfbMLF

In ARPGS, I've always enjoyed the "high mitigation, high recovery, low HP" style since I first played a Shillien knight in Lineage 2. In PoE however, it seems kind of hard to replicate since most life recovery is scaled off your total life (HP, most sources of regen).

With the changes to Immortal Flesh, and a few things that make shield crush armorstacking a lot more interesting, I'm thinking of trying my luck with an archetype that I haven't played with yet, armorstacker jugg, leveraging high phys mitigation to trigger high HP and ES regen, and trying to abuse "flat" (i.e not scaled to my life total) sources of life regen.

Do you have any thoughts on the PoB I linked? the specific item rolls aren't super important (I haven't made a huge effort making them realistic, I was mainly playing around with values). It looks like even being a lot more conservative it should be possible to reach peak DPS of 5m pinnacle, which seems plenty good for most content at this level of mitigation.

My main worry is DoTs/ailments/curses, since they're somewhat difficult to mitigate on this part of the tree. Any ideas and mechanics that could improve the build are welcome!