Pretty much Stormscale for H and Outland / Sylvanas for alliance. But expect a lot of retarded rbg leaders to request 2.2 exp for the smallest crap.
To work @ that, don't pug. Even if you see people at 2.2k, I can guarantee you that they either wintraded or got boosted. The few ones that do it legit are in a guilds with close friends.
I hoped I helped