I've been playing my soulrend aurastacking for a couple seasons now and it feels extremely strong this league. Mainly because ive only been doing ultimatum.

I've been buying 8 div inscribed ultimatums and duping them for the past couple days and honestly this is extremely fun. I personally love arena style game play and this build is meant for that. Being able to take the strongest of hits and walking it off like it nothing or just let aegis do all the work like it usually does.
Here is how the build runs arenas:

https://www.youtube.com/watch?v=1MGLYY3zHzM
Since this video I have tripled in EHP with Forbidden flesh and forbidden flame for the extra block chance and regen from bone offering.

POB
With item sets for budget players and an item set for players who have the divines to spend them on. I don't have all the time to be able to set it up so if anything is improper please let me know.

https://pobb.in/2mqfGve8HlqM

POE ninja search for the build
https://poe.ninja/builds/necropolis?skills=Soulrend&uniqueitems=Crown+of+the+Inward+Eye,Aegis+Aurora,Incandescent+Heart

POE forum post a more detailed guide
https://www.pathofexile.com/forum/view-thread/3464356