I´m not sure if this is an exploit or a small trick.
A friend and I grouped up for the dailys and had "Given a second chance" (Given a Second Chance - Quest - World of Warcraft). While I was using the bandages on a defender, my friend bandaged the same defender and it counted as if we healed 2. Normaly you would have to do this 5 times but we only had to heal 3. Might help on crowded realms.