Couple things real quick:
1. Are we the only guild that uses frost mages? were farming hyjal/bt and all our mages are frost and went frost at about 2/5 T6. And by frost, I mean a chillbot and rest 40/0/21.
2. The only boss we don't throw CoR on is gorefiend, and thats just because he already hits like a truck. There are some bosses where you can get away with juggling it, like RoS, but we play it better safe than sorry.
3. We also don't use CoE unless there is at least 2 mages in the raid. Let's think about it. We could be wrong, so lets discuss this for just a minute if you don't mind.
This is the simplest way I can think about it. Let's say CoD hits for 12,000. Sometimes higher, sometimes lower, but lets assume. Thats 12000 damage per minute. Lets say you have a fire mage doing 1000 DPS, or 60,000 damage per minute. If you swap CoD for CoE, then the mage would do 10% more damage, which would be 6,000 less damage than a single CoD hit. You need a mage turning 2000+ DPS to justify using CoE over a 12k CoD hit. At least, thats my simplistic rational, if I'm way off please correct me.
Edit: the whole mage thing, on what spec is best, I think a lot of it is personal experience. It is generally agreed that deep frost is the hardest of any of the specs to play well, so perhaps some mages play better as arc or frost or fire? Just my experience with mages, there is no universal 0/21/40 spec for em :( varies between each individual. Which, in my opinion, says a lot about how each of their trees is more balanced for raiding than ours.
Edit: wtf is with me getting karma camped, every single one of my last 16 posts has been rated down by someone, yet I get absolutely no response. Good to know people here can click the red button, but don't have the balls to even give a reply.
Edited, Mar 8th 2008 1:10am by PriestOfSouls