Don't listen to Thunda_Cat_SMASH, they seem to have a opinion that the only thing SCH is good for is to keep slamming the Broil key over and over again. The toolkit is more involved then that and about healing / DPS balance. Make sure your fulfilling your primary function as a healer first.

At this time, focus more on the fundamentals of healing and work up towards the comfort level of being able to balance DPS and healing. With that being said, once you do hit a certain gear level and get comfortable with both yourself as a healer and the capabilities of your toolkit (including your fairy), you will indeed be able to maintain Cleric Stance for long periods of time.