Originally Posted by
Aeyis
Save all of your leve quests for high level (25-35+). Leves tend to give exp comparable to the level you first get them. At higher levels you would need to craft more items per level, making levequests the better option.
Exception:
If the materials for a levequest or normal crafting in a certain level range are very expensive or hard to get, you can use levequests to breach the gap to the next leve (new leves come at each 5 levels). I won't advise doing this below level 25, however.