To really maximize your output, it's important to manage your fairy. Proper use of cooldowns adds a huge boost to your healing. A buffed whispering dawn easily puts 3000 or more hp onto your party, which is a big strain off the white mage.

At the very least, I'd recommend macros for embrace. This will let you direct your fairy's heals before they would normally go off. Even better is manually controlling embrace. This lets you split your heals between two targets, or to focus heals on your tank when they would otherwise go to lower hp dps. Just remember that anything your fairy does is FREE! Don't let those valuable cooldowns go unused if you have to consume mp to make up the difference for them