Hoodoos and Voodoos

Why nobody train on them... Since BB their map are empty like hell!

Well, there are better options now. Also, the map has a pretty small spawn count, only 4-6 monsters at a time, and most people can clear it out before the next wave. Being able to train on a continuous stream of monsters that give slightly less experience is better than being able to train on a small number of monsters that don't spawn fast enough while giving more experience.