I hunted skeletons solo through level 10. After level 10, I hunted in
Lavastorm in groups, fire drakes were really good experience and have pretty
decent loot for your level - gems and coins and such. Also, Befallen might
be a good place to start heading - with a group. I never solo hunted after
level 10 - just not enough DD power. Might depend a little on your race
though how far you are willing to travel without being able to bind
yourself..

Lavastorm and Befallen were close walks for me, being a dark elf :) and good
experience in both for levels 10+

Sirensa