Quick update: it took me only 2 BRDs to take my shammys up to 45.. no I go to Scholo.
Scholo is really nice for boosting because it has many big rooms full with cloth mobs groups... for example: I pull the entire first room (around 40 mobs) and i get 30k xp on each shammy :)
Update: 5 Scholo and i hit lvl 50.
Update: Scholo, Scholo, Scholo... and i got lvl 55. Now i go to ramparts.
Update: i just made 5 Ramaparts and i hit lvl 60, huh.