in a list of 1 to 5, 5 being the hardest I would say:
1. Wizard city (it had really easy quests and enemies) 2. Grizzleheim (the quests seem a lot shorter for me) 3. Mooshu (not easy, but I kind of got used to it) 4.KrokTopia (it was real boring after awhile and it really made me mad at points) 5. MarleyBone (this wasnt hard it was just annoying! it was dark and boring, and I got pulled into lots of battles!! ) 6. Dragonspyre ( it had some of the hardest enemies ever and seemed like the level lasted forever!)