I have the same problem as the OP. At low levels there is very few people around. If it were my 1st class, there would be no problem cause at the beginning I had a lot of rewarding quests, but not anymore.

And fates, I need to solo them all, there is too few around to help (or interested in helping). Not to mention that it takes several minutes for each spawn.

So from reading this thread, that the best way to level a sub class is by chaining mobs?