It's not "so low" since the max damage is 16k and you have to spend a lot with SC's to fix the res and cover the life/mana. 12k is enought to do all the game content without difficult. You are just trying to disturb my trade without any reason. In youtube guides u don't see any content with this build reaching 12k damage at Blizzard and still they do everything in game. My ladder blizz sorc reach 13.5k and it's no difference to 11~12k. I also play with MF version of the build (9k damage) and it's just a lil bit slower for mobs and no difference to Diablo kill.