Don't ask tanks for more work.
A Bard friend of mine was working on finally reaching 50.
"Queue times are too long, can you help me?"
I join up with him (ilvl45~) and we begin running Aur Vale.
Our group was; i45 BRD, i45 SMN, i90 WHM, i85 PLD.
Initially I'm dreading this dungeon mostly because I know it's going to be slow and there's 0 benefit in me being here for this 45min run.
Tank starts pulling 2 adds at a time.
/fc "This is going to take forever..."
/p "Tankbro, you're invincible here, we're both nicely geared, pull some more adds!"
/p "SMNbro, aoe!"
-Proceeds to pull 5~7 adds at a time without burning cooldowns-
I don't say anything because I pretty much asked for it, panic hard, burn divine seals and SoS 'cus I'm dragging hate all over the place for my insane Cure I spam.
After first boss he slowed down to a less 'screw you' pace and it was nice.
Moral of the story: Don't Ask Your Tank For More Work Than You Can Handle.