There are 2 prestige quests (for Prestige Pass members) in my log given by Shugorobo are to complete one of 2 dungeons. One dungeon can be completed once a day, the other once a week. These dungeons reward crafting mats or keys to open a special reward chest and a whole lot of experience. You do not play your class in the prestige dungeons but a bolt-on generic set of abilities in each dungeon. The Shugorobo dungeon quests give so much xp that you could probably get to level 80 in a week or less.
There are open world quests and some open-world dungeons (the entrance is out in the game wor