I have done the 5 Mage and a Druid/SHM for healer.
DRU lacks during named with High DMG aka AEs
SHM is your best route. However,
MAG, MAG, MAG, MAG, BST, DRU was found to be interesting and produced about the same or better results as the 5 MAG & SHM combo.
I believe this was to buffs and...