I am just doing this off the top of my head, as even though I am sure there is some way and someone who tracks this sort of thing, I haven’t seen it. But my guesses would be:
1.) Survival Hunter, an attempt to shoehorn in a melee Hunter spec by any means necessary. I legitimately don’t think I have ever grouped with a Survival Hunter in any type of content.
2.) Brewmaster Monk, the fairly complex tank spec of a class that never really caught on the way it deserved.
3.) I would historically have said Subtlety Rogue, but I know I have seen it frequently being very high on those DPS rankings the usual sites drop on Twitter every week.
Thoughts??