I wouldn't say facerolling your keyboard as a BrM takes any more skill than using the pet - which to do both well and at a world first level is a lot more complex than one may think. I guarantee if we spent some time in the place we'd nab world first using a DK with relative ease, but what's the point? zzz
Seems silly, why not just take a blood DK and a frost DK if you want to MC two ghosts on the first boss? They can DPS at the same time.
I've never seen anyone do that because that would mean you aren't healing.
Unless you're Shadow, in which case my question is why are you playing Shadow in CMs?
- - - Updated - - -
Well, DKs are beyond excellent for CMs (blood that is), so it's not such a huge penalty to be sub optimal for times :P