Technique possible as of July 19, 2014.
Casting multiple buster spells before the cooldown locks out casting. Can be used to spam attacks or to attack and heal at the same time.
You can also cast both heals in one cycle, but you're probably in serious trouble if you need to do that (ideally, you'd want a bishop in your party if someone's taking that much damage).
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Most Dragon Buster players will have noticed that every time they use any buster magic, all of...