PoB : https://pastebin.com/avNc2Nnm
I built this to be able to handle deep delve bosses no matter the mods, and not have to fight them for ages like i did with my zdps rf build.
Turns out it's very good at tanking and killing ubers too.
I'm ssf so kinda limited gearwise and there's a lot to improve, starting with a good weapon and a helm enchant (it's in pob already but i haven't started to farm lab yet!) but also chaos res (i'm only at 30%, but i should be able to get to 70% when i recraft my gloves and divine my items).
Overall the gear is easy to craft, and the build is easy to pilot, very good to learn Uber fights since you can tank most mechanics.
You can get around the melding res penalty by switching the eldritch implicits on gloves/body armour or using a sanctified relic.
Other videos :
Uber Exarch
Uber Maven
Uber Eater
Uber Sirus
Uber Uber Elder
Uber Cortex ( tough mods, i was greedy and didn't use a crit reduction watcher and died at the end :( )