What's the most effective lvling method today? (In your opinion)

[Rufalus]

I was just killing time waiting for my wife last night. To do so I just kept re-queuing for Guildhest Roulette, and I was really surprised at how quickly the experience was flowing. Sure they tend to give relatively low amounts on their own, but they only take a few minutes. Not the fastest, but certainly a nice way to break up the grind of dungeons and FATEs.

True. It helps to do every one of the guildhests each week. You'll notice an extra bonus the first time you do a specific guildhest that week. Have a look down the list of them and you'll see big bonuses associated with ones not completed recently.