there are a few options to hunt between 10 and 20, alot depends on your race/ class combination. Kurn's Tower off the Field Of Bone is an excellent choice for undead, as well as Estate of Unrest. I had fun in Everfrost Peaks also. Or even a little deeper into Blackborrow.. There are so many servers now unless you're on an older one like Karana where I play, it's really tough to find a sustain groups outside of a guild.