The main issue is you are using a build designed for fishing high GRs and group play. While the Sacrifice variant build has the highest potential under the correct circumstances, it is going to fall flat in a lot of rifts.

Since you're not pushing the bleeding edge of progression, you might consider making some modifications to your build, such as:

• String of Ears instead of Witching Hour

• Zdogs - Leeching Beasts instead of Sacrifice (with LoH on your weapon, preferably)

• Unkapian Serpent or Henri's Perquisition instead of Homunculus

The above changes will make you incredibly tanky. You will be able to more consistently successfully tackle rifts the other build would abort on sight, even though your theoretical limit will not be as high.

I was able to run the above configuration last season, and the build was tanky enough I swapped out Spirit Vessel for Confidence Ritual for some extra damage.

Also, don't underestimate the additional toughness upgrading to ancients, and then augmenting those ancients, will give you. Ancient items have more Int, more Vit, and higher possible bonus armor, all resist and resist rolls, all of which will increase your toughness. As will ~3-4k more Int from even moderately leveled Caldessan's Despair.