With this, you will be able to have numbers under "Healing Done" in a battleground BEFORE it starts.
(1) Have yourself or a friend obtain a Crystal of Zin-Malor (Crystal of Zin-Malor - Item - World of Warcraft), this will drain your mana and HP.
(2) (Optional) Queue yourself for a BG and equip the crystal once you are invited to a game. Wait until you are at 10% health or so, and enter the BG.
(3) With the crystal on, spam heals on yourself or your friend, whoever has the crystal. The "Preparation" buff will continue healing your mana and health to full, but it is on a 3 second timer or something, while the crystal ticks at one second.
(4) Enjoy being at the top of the charts
**Edited for repetition for repetition.
**Edited again for screenshot