Tonight, my guild attempted for the first time to try Mimiron's hardmode in 10 men (we were all very well-equipped with coliseum/T9 gear). I am proud to be a Discipline priest, I have faith in this wonderful spec. But, something is wrong. With all the complications of this encounter (and the fact that others 2 healers were shamans), we found that an holy priest should be a lot better than disc, in this case at least (they think holy is always better, but I said them a lot of time that they are still at 2.4 about priest's healing XD). Now, I would know: is effectively "impossible" or "very very hard" to heal in mimiron's hm as disc? Without another great aoe healer, such as resto druid or holy priest?
P.S. Sorry for the language. And sorry if there is another thread similar to this, but I would know the specific case of mimiron, not in toc hc for example (where my contribute is well appreciated).