I usually have a more or less one size fits all rotation for mob pulls, which is asylum -> cure 1(if tank is hit) -> aero 3 -> holy plus maybe an assize, then I go back to healing as needed.

So I did the Vault a couple of days ago and at the 2nd pull I threw an asylum and the tank proceeded on tanking right outside the bubble. I say to myself, okay, it can happen, no biggie.

The next pull where assize became available again, tank proceeded on dodging my bubble again. At this point I'm slightly confused, as my asylum wasn't overlapping any aoes and the tank wasn't a leaf, so I'm sure he must have met other whm that use this. But then the tank proceeded on eating every aoe in sight and died.

If you can easily dodge my sparkly hp bubble but fail at dodging the damage dealing aoes, then I will throw the bubble on myself out of spite. Which I did, for the remainder of the fight. It's my bubble, you can't have any.