This build was inspired by Masterbob96's build here, and svr who showcased it on his stream. A few hours later I had a Reddit discussion involving the Sage's set and it dawned on me that finally this build would allow for the possibility of adding the Sage's set!
As opposed to the original build I'm sacrificing Hexing Pants, Leoric's Crown, and Steaurt's Greaves. Leoric's is not too much of a loss (since we want to kill elites only and have a 100% In-Geom uptime), and for the same reason the boots don't hurt either as we're basically just Blood Rushing around. Hexing Pants hurt - but the 25% damage loss is less than giving up any of the rings. You might argue that keeping Hexing Pants is better than Moribund Gauntlets though - your choice!
I also toyed around with the idea of dropping the Golem and Commander of the Risen Dead passive, instead taking the Frailty Aura with Spreading Malediction; but after trying it out I figured that the occasional Golem is really nice when you're "out of enemies", such as in cave maps.
In general it is very important that with this guide you "don't go too high" - basically your kills translate into corpses which are transformed into Corpse Lances which kill more stuff. Don't rely too much on the corpses from Golem/Blood Rush, and keep Land of the Dead for the RG or the beginning of the rift.
The original guide used a Zei's Stone instead of Bane of the Powerful, but I preferred the more brain-dead variant of the BotP which lets me go anywhere and not focusing too much on distance. Credit for this idea to svr again! And also one last time credit to masterbob96 for this build. Check out both of them on Twitch!