The best place for levels 8 through 12 I believe are the Misty Thickets.
Great experience from the Goblins, Orcs, and as you get into the upper parts
of this range Motto the named Goblin. There are also Bears, Young Kodiaks,
Giant Scarabs, and Giant Wasps for the occasional amusement. There are some
fun quests you can complete while you are working your way through these
levels as well. Good Luck.

Horus
Plague to the Tier'dal
Avenger of Freeport
Rallos Zek