This is based on multiple runs, for simplicity sake be advised these are likely not exact levels listed. This is a rough guide for anyone looking for further knowlege.
Levels 1-30 will have plenty of quests from the new adventure quest line found under ctrl+n.
Levels 30-70 will lead you to the silent arena and eventually to the swamp around level 50. Avoid giant lizard quest unless you are a tank. They are quite beastly with arguable rewards.
Once you hit leve