WoW Insider: Bouleau, what class and what qualities do you feel make the best healer for CMs?
Bouleau: Looking at the current worldwide leaderboards, I suppose most would be inclined to name the priest class, which I think is an accurate guess. Priests -- more specifically, discipline priests -- excel more than any other class at dealing damage reliably while healing, and this matters a great deal when pushing for times, both for gold ratings and beyond. And yet game balance always fluctuates over time, and I recently learned that Blizzard has Atonement under the radar. With 5.2 not out yet and class changes still being announced regularly, it's not impossible that we see a shift in favor of another class in a not-so-distant future.
For those that may be wondering why discipline is superior to holy (which doesn't mean holy isn't viable for gold times), here's my view. As a healer, you ideally want to achieve two things: Keep your group alive, and deal damage. It seems simple enough on paper, at least until you start improving your times beyond the gold milestones.