[Lorraine]

Solusek B has some decent spots, especially the ramp that leads to the SolA entrance by the window room, you can pull singles all the way up there and avoid all the SolB/Lava zone entrance trainage - dogs don't have as much HP as Kunark mobs do, and the XP is quite good + it's a very safe camp. Once you can click the DW helm, you can probably stay there and solo for a good 4 levels or so.

EDIT: Forgot to add, available vendors are right outside too.