Ive searched for this and i did find one other way ontop of the AB stables, however i did not find the way i found.
Id suggest you do this with a noggenfogger (the shrink buff) as i did this with a gnome and its kind of a tight fit
Basicly do a walljump to about the point of the yellow dot, carefully aim towards the red dot (the corner of the hut) once you are on the corner of the hut id suggest to slow walk to go around the small blockage thats there, once ur past go to the green dot and jump ontop of the roof of the stables!