[guineapig]

I would say HHK basement fits all your requirements except for the fact that there are a few casters. That shouldn't matter too much though as you can move out of line of site easily once the camp is broken. Just send in the charmed pet instead of pulling with tash and you shouldn't get hit with spells too often.

You can also get high level buffs while your there, sell to vendors, bank... It's a 1 stop shop. The camp won't always be open but you are more than likely to get a spot in a group if there is one there.