Best place for do this is in the teleport of the task endurance of the old warzones:
Once you have done this task you won't be able to enter again the respawn, so the teleport 'kick you out'
You just need to put fire before the teleport this way:
And just keep runing into the teleport from the north to the south:
Advice: Wear fire protection set. If you can 'bug' the south arrow key of your keyboard with a magnet or a pen...I did and it worked ^^