Quickest way to level up now?

[ReynTime]

That is not actually correct for 2 reasons:

1) NA servers no longer have preferred realms. This will change in the future but as of today, no North American server will give boosted xp. But people can choose to play on a different continent server, if they don't mind some lag.

2) Most of the quests between the end of ARR & Heavensward were removed. Now, you are lucky to be level 51 when you start HW in a non-preferred server with quests removed.

This is not true at all. You're already 51+ by the time you hit Praetorium. Removing the quests did nothing since X.1~55 MSQ always gave 10k exp regardless of what level your job is. Most the experience you're getting post 2.0 comes from the duties you end up doing.

And if you grow the habit of doing leveling roulette every day, with only one job you're going to be at least 54 by the start of heavensward. In a non boosted server you can easily alternate between 2 jobs without falling behind the MSQ requirements.