You Can Do the Dolmen Shake:
So, there are these things in Elder Scrolls Online
called dolmen. They are places where a great evil from another realm can breach the fabric of reality and pour forth creatures to attack this realm. (Those familiar with the game Rift
... think rifts.) These, in and of themselves, are high-experience encounters. Further, they attract a lot
of players, so enemies... even big, mean, scary ones... typically get wasted in a few seconds, so there's not a whole lot of risk involved. Finally, when the encounter is over, a treasure chest appears with some sweet loot. Nice.
Desert is Served...
There are Dolmen in various places, but VanguardGamer pointed to three in the Alik'r Desert as being the most efficient and when I tried them out, I would have to agree. All three dolmen are close to a wayshrine, so you can pop in, ride over to the dolmen as you hear the horn blowing indicating that the event is starting, earn some XP, grab some loot, ride back to the wayshrine and the pop over to the next one. In my experience, the timing's nearly perfect that when you get to the next wayshrine, the event there is beginning. These events occur in a rotation at these three dolmen, so once you've established the order, you can just keep bouncing from one to the next, either clockwise or counter-clockwise (doesn't change during a given instance, but can be different if you log out and back in).