The first thing I did when I hit level 50 was level a Thaumaturge to get swiftcast. As a healer, why would you not want a spell like that? Its usefulness is through the roof. Instant Cure II, Medica, Medica II, Raise, Protect, Clutch Holy Stuns. A Divine Purpose, Presence Of Mind, and Swiftcast combo allows for powerful burst healing. The only downside is literally just leveling a Thaumaturge to 26 which does not even take long at all. Yet I still see other healers without it. Why would you not get such an extremely powerful spell like that?