To be fair, that's all you need.

If you think that's too little, just wait until you random in with me on my shammy. I'll earth shield you, /follow and go make a sandwich. ;)

It would've been fine if it wasn't Utgarde Keep and the priest wasn't in all level 60 gear.
And he still refused to use Only shield, renew and Penance.
I get down-ranked for sharing personal experience.
Awesome, at least now I know better.

"I get down-ranked for sharing personal experience.
Awesome, at least now I know better."

Wrong. you get downranked for sharing personal experience that looks an awful lot like a blanket statement on all disc priests. I don't care if this was intentional or not, don't get all butthurt about being downranked when you're the one making inflammatory comments.

On topic, This is an awesome article, a healer truly does need to understand the other players in a raid more than any other role, tanks being the cornerstone of the raid means that you should always have at least a basic understanding of what your current tank is capable of, when you get into a random the first thing you do is check the tank's health, but it's also good to observe gear, class, and spec If you want to have a good idea of the kind of healing you're going to be doing in the run.

And thus we prevent wipes =)

Wait a minute .. in heroics the only thing I end up healing with most of the time is Holy Nova from my "run in and spam it on the mobs so I can dps and heal at the same time because this is too easy" tactic. :p

But yes, in reality like others have said, most times a bubble, renew, or prayer of mending is all that's needed for a typical heroic setup. Penance and flash heals are reserved for badly geared tanks, or one of the ICC heroics.