[Messianic]

I had the best time in Steamfont on Faydwer - You can do the normal mobs until level 3, then start taking on the single kobold spawns north of the druid rings. Some of the camps have linked kobolds, but just taking on the single spawns kept me killing mobs at a steady pace, and was really effective overall...

Then at 7/8 you can go to the Northeast corner of the zone and just kill the static spawn Ebon drakes (which drop decent coin/gems), Skeletons, Spiders, Rogue Clockworks, and maybe Harpies (which are slightly higher level). That'll take you to 12 easily. Crushbone is okay, but there's always a billion people there and the xp largely isn't that great unless you're a class that really needs to group.

Next, you can go solo singles at the chessboard in BB or go to Unrest, although I never liked Unrest much...