It is the only viable way to level, like it or not. There are no more quests since those have been dried up doing the first run to 50. Dungeons? I like doing them for a change of pace and do something more than you know just spam aoe. Are they viable for leveling? No, up exp maybe a little and it might. I'd welcome it.

Leve's are better saved for crafting/gathering.

What is a bother though that from 20 to 30+ you pretty much stay in quarymill for fastest/best ? exp.. dull