I am not saying it's exclusive, but in my _opinion _Elonian Scourges would be my choice, due to them being the culture that has most of them, and the culture that created them. You don't need to agree with my opinion, but lore-wise my statements have been correct. I never insinuated that Elonians are the only ones that can learn the Scourge specification. In fact that specialization only opened up in 1330, merely a few months from the timeline of LS4 - Daybreak. So most (if not all) core Tyrians would learn this specialization in that time period. But I digress, and my opinion still stands.