another little trick i've came across is with swiftcast. if you time it right, and start your cast at the right time, you can cast 2 Fire III's or 2 Blizzard III's at almost the same time. the first cast will actually take the real cast time of the spell, while the other will be cast instantly (because of Swiftcast). From what i can tell is, when you start the animation for Swiftcast, start casting a spell and it will take the real cast time of the spell. it wont count your swiftcast because you started the spell before the buff became active. by the time it cast, you will have the swiftcast buff and the next spell will be instantly cast. useful so far in a few boss battles.