What Mastery level will the Patch 1.1 Pinnacle Bosses be balanced around?

Classes like Warlock or Classes like Shaman? Because if you balance it around Warlock’s power then Shaman is going to have a bad time. If you balance it around Shaman then Warlock will just kill the “Pinnacle” boss by breathing. The gap between the two is so huge that even a middle ground will be skewed.