I've tried doing a build by myself using the templar Holy nova skill and expulsion, and I was barely able to beat mythic 1 anomalies. I've then decided to try a build that is similar to mine and it got a lot better, but the build was kinda old since some items have been nerfed, so I tried to change some things to add the lost survivability (it was a stagger damage survival). I can beat mythic 10+ more or less easily, but a loot of the time, i just take massive damage that basically one shot my character. what ecatly I am doing wrong?

build: https://imgur.com/a/i0ufLw2