Well then, that means that healer is assigned as a "raid heal" as I mentioned earlier. Which would mean that heal should in fact have the largest total heals if you are "by far" the main healer.
Which validates my point, and others I might add. The default BG meter is not really a good measuring tool to use to judge as to whom is a "good healer".
I am not sure how many premades you have healed recently, but I can assure you that your three healers do not have static duties the entire game. It's not like a teams gamelan going into a match is:
"Ok healers, there are three of you. Mistweaver, you are the raid healer, because enveloping and yeah. Just heal the raid. Disc priest, you can burst a ton of quick hps with flash heal > penance, your job is to spam heals on the bm monk, because frontline. Hey shaman, don't worry about healing much, just dispel off cooldown, on random targets, cuz hey, you are mitigating damage."
That just doesn't happen. The healers react according to the situation, cycling between raid healing, single target healing on frontliners/fc, and offensive pressure on offensive pushes (when the other team it's down a few major dps).
The key is to be flexible, and make the right calls/switches at the right time. If you can peel out and catch your fc when none of your other healers can, you do it.
The only two minor exceptions are having one shaman focus on dispel/purge spamming, or a very offensive disc priest that a certain team played in the tc.
