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.
Maw of Souls
Black Rook Hold
Vault of the Wardens
Court of Stars
Darkheart Thicket
The Arcway
Return to Karazhan: Upper
Halls of Valor
Eye of Azshara
Neltharion's Lair