Class Frequency By Run:Each character will be counted for every run they are in.
Unique Class Population:Each character will be counted only once, despite how many runs they are in.
The Arcway
Return to Karazhan: Lower
Halls of Valor
Court of Stars
Vault of the Wardens
Eye of Azshara
Return to Karazhan: Upper
Black Rook Hold
Cathedral of Eternal Night
Neltharion's Lair