The guild i was in a while ago said i should be doing more DPS than i actually am, I did my rotation perfect, and this may sound bad but i did the rotation multiple websites told me to do, but the other death knight in the guild always did more DPS some how, and to this day i still can not figure out why, even when the ICC buff got larger i still did roughly the same amount of DPS, i did raise slightly though. Here is a link to my armory and can someone tell me how much i should be doing.
http://www.wowarmory.com/character-shee ... cn=AhrizarDPS output: 11k on most fights in ICC
Rotation: IT,PS,BS,SS,BS,DC,HOW
BS,SS,BS,DC,DC,(DC if enough RP)