If you use SK - 100 as a gauge of what works and what doesn't in Arenas through all the brackets, Shamans have a 14% representation which is #3 out of 10 classes. Which is kind of staggering since there are more Shamans in the top 100 than Rogues/Mages/Druids/Warriors Combined. Every single one of those Shamans is also Resto heh

There is 2 Shaman in the top 10 on Tournament Realm as well, where some classes don't even exist.