This right here. This is what I'm talking about, and why it irritates me when the dps try to throw a physic or cross classed cure at the tank.
And I have mentioned it to the player, who then gets shirty with me about telling them how to play.
The tank doesn't need to be constantly topped off. It's a waste of mana, it's boring, and if that's what I have to do if I'm called upon for Tam Tara the third time this week I will scream, leave, and happily take a 30 min penalty because I don't play heals just to spam one spell mindlessly.