I recently created a new character..... A Human Pally.
In Elwynn Forest (Human Territory) , There is a farm called "The Stonefield Farm".... it is located just west of the fargodeep mine....In this farm, there are boars between the levels of 5 and 6.... They arent very strong and dont have alot of health.......
The best part?
Instant Respawns!!
The mobs arent hostile and dont run so you dont have to worry about aggro from the runners.
Good Luck