Step 1: Gain ability to solo T6 elites without dying.
Step 2: Join HellRift community
Step 3: Do Hellrift, Cryder's Oupost, Forward Barracks, Khazra Den bounties
Substep 3: Invite people from channel to clear the aforementioned bounties.
Profit! #1 is important because it's not a "find and leech" channel, and generally only has a dozen or two people in it. You will be quickly blocked if I think I'm clearing bounties for you.
As far as Hell Rift nerf, I thought the only nerf was adding a high chance of elite packs to level 2?
The other (I think more popular method among really high-end) is T6 Malthael farming.