

I can imagine, with fully augmented gear and decent paragon, GR130 should be reachable without much problem. With almost full ancient gear (except of rings), 950 paragons, 105lvl gems and 2 augments, I can farm GR110 comfortably, and GR90 takes me around 3-4 mins (depends on map). Same time, while doing GR90, level your gems up so you can use them for augments later on. And gamble for armor with Kadala, to make your set ancient. You should aim for ancient weapons, they've given me a crazy boost, I wish I've had them earlier. The loot is also capped at that level, so playing +GR90 will give you as much drop as GR90. I would strongly suggest to farm GR90 if you can do it fairly quick as it gives the most legendary items per run. When you open a Rift, the Obelisk will transform into a portal leading to the first floor of the Rift. You can enter a Nephalem Rift from any Act's town by interacting with the Nephalem Obelisk. Leveling paragons and gems for augments, and farming gear is just better at this point. Nephalem Rifts are an end-game activity in Diablo III accessible in the Adventure Mode. Only done it to push my gems higher but it wasn't worth it. I've done it with 3 ancients, but it's super time consuming and I've died few times each run.

Around that paragon, with all the necessary equipment, good stat rolls and gems close to 100lvl, you should be able to get close to GR110.
