Really? OP? You don't want your healer to dps and help making the run faster?
My main is a geared paladin, and also have a not-bad-geared whm/sch.
I love healers that dps in my runs, I hate those that does nothing but spam heals.. I don't need to be topped off 100% of the time, not to mention most of those heals are overheals.
That being said, when I play my healers, I tend to dps a lot. So if you tanks don't do your job and avoid dmg as you should... I will try to communicate with you about it, but if you intentionally eat those easily-avoidable dmg, I will probably leave or let you die.
ps: having healer overhealing you the whole time is bloody annoying.. also very noisy cuz you hear the heal every 2 sec or so...