@jealousiprate

We're damned if we do and damned if we don't. As long as you've got at least 50% mana, I ain't stopping :)

I am guilty of slamming through an instance as fast as my raid gear can carry me.

On the other hand, I like to communicate. "I'm putting on a ton of threat gear, let me know if you want me to switch back to stam, heals." "Just slow me down if I'm going too fast or if you need mana."

And regardless of how fast I go, I always readycheck before every boss. Even the stupid ones. It only takes a second and I think its polite. (Anyways, I'm a pally tank, and I usually need that second to mana up haha)

While queueing as a healer is fast, I often get stuck in "dungeon already in progress" groups where the last healer bailed because the group was so terrible. So the quick dungeon finding process is usually pretty well balanced by the fact that I'm going to quickly go bald from all the hair I tear out trying to heal those groups.

Call me an old fashion Tank, but I ask the healer to let me know when they want more mana and then start the pulling. As far as I'm concerned the healer sets the pace of the run. They know best how much mana they need to keep us alive (and I have cool downs for when their guess is a little off =)

Chain pulling can be okay, but I think it definitely stresses out the healer most of all. Even if we outgear an instance I like to mana up before bosses and considering how many people like to brute force encounters this only puts more strain on my mana.
The worst, though, is when people are going so fast they LOS you on some pull and then you got to use mana intensive abilities to catch up. There's a bunch of places like this but the one that springs to mind the most is right off the top of the stairs in HOS after you've just gone through the furnace. I don't remember how many times the tank wants to run into that first pack off the top of stairs and I can't heal them until I run to the top and actually have them in sight for my spells. That one tops the list also because its right after the trash in that furnace and most tanks just group them up at the bottom of the stairs and expect big heals to get them through, but usually a dps will die in the process from being grouped up with all the damage.