Put up some screenshots of my grid and isboxer configuration:

http://www.cyrberus.eu/wiki/index.php/Clickhealing

For the small bgs i switch them to ferals. But yeah, i should try healing AB. Never done that yet
Next thing on my list to try is a mix of healers/ferals, like the popular dk/pally combo, but with all druids.

The healers can still do reasonable damage. About the same as 1 dps player. Specially fun when defending a tower in av. Must be so frustrating if you get killed by healers