We go to ONY10 but in this situation all of the normal tanks including myself aren't tanking it but we are going to heal it. We are going to use a Warrior MT and DK OT. We have one Disp Priest (normally Frost DK), one Restro Shammy (normally Prot Pally) and me as a holy priest (Prot Pally). We wipe, wipe and wipe in the 2nd phase. No matter how much we tried; it didn't happen.
Wiping repeatedly in Onyxia 10 has nothing to do with healing class makeup. People just failed.
and then Disp was dead last on healing (has about 150 more points in gear). The Disp Priest was bubbling like normal and I think dpsing as well.
Gee, maybe he was dead last because he was DPSing and because absorbs from shields don't show up on precious recount meters? (Why was he DPSing at all?)
Remember bubbling a warrior or druid isn't good. It cuts into the rage and limits their ability to hold aggro.
This is not true and has not been true for a long time. Sorry.
It's ok, in a moment of crisis and it's better to hold the tank up so you can get that heal in and take a risk to loose aggro for a brief moment. But constantly isn’t going to work.
Again, not true. Even if it WERE true (Which it still isn't) if a tank lost aggro because of a PW:S, they would be doing something terribly wrong.
Healing meters are a TERRRIBLE way of measureing anything, anyway. The very fact that you're using them as a way to measure that one class is better or worse than another is the first clue that your logic is flawed.