1. Acquire Boon of the Hoarder Legendary Gem
2. Acquire Keystone of Trials
3. T6
(Optional) 3.5. Equip tons of +gold items
4. Complete low level Grifts
Explanation: Grift mobs don't drop any gold or items but they do trigger the Boon of the Hoarder proc as some of you may know. However, Grift difficulty is independent from your current Torment level and you will still receive the gold drop amount bonus from being on T6. Upgrade your Gem and equip gold find gear to maximize your gold income. I dont really have any gold find equipped, but I got around 5 mil for a level 10 grift in ~5 minutes. Not picking up purple orbs can probably help maximize gold gains.
Discussion: Some people may think this is completely useless, which is mostly true. This will be very good when you start seasons though, if it isnt fixed. Gem upgrades, rerolls, etc. I've spent 300 million converting my stacks of marquise gems to Flawless Imps/Royals