Link to video
So I was
Cursed Chest farming for XP yesterday when I hit the mid 60s and didn't have the gear to be as efficient as I wanted to be. I reverted to
Royal Runs, but those weren't significantly better, so I started trying out different bounties.
As I completed a minor side-quest on the way to a bounty, I noticed my XP bar jump significantly. Realizing the quest involved killing nothing and could be completed in all of 10 seconds, I tried it out with a level 60 character on T6.
I filled up 80% of my XP bar in my first quest completion.
It's not a fun way to play the game, but if you don't have the gear to legitimately level from 60 to 70, and don't have anyone to powerlevel you, then you can take advantage of this until Blizzard nerfs it, like they did the
Refugee Run.
EDIT:
Oh, and I just realized this is also a decent gold farm. 100k gold per run. Adds up to millions in a couple hours.