Okay, I'm officially confused. I've heard dozens of people now saying that the best time to use Adloquium is right before a pull or before a big aoe or some such, to mitigate damage. However, Adloquium's actual skill description states that:

Erects a magicked barrier which nullifies damage equaling the amount of HP restored.
I've always worked on the assumption this means Adloquium only absorbs as much damage as the spell actually healed. Therefore, if you use it on someone with full HP, you haven't restored any HP, therefore you get no shield.

Can anybody back me up on this one? Was there a change in a patch that I'm just not aware of yet, or have huge chunks of the community been saying something that isn't true? Or does it work some other way and I just don't understand this description correctly?