Okay, first thead, first time trying to contribute.. Looking forever to find something someone else hasn't found so I did a quick search found nothing. (Don't flame please.)
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So, when your doing the [The Air Strikes Must Continue] (Daily) quest in the new Isle you can multi cast the item. Assign a hotkey to the item and right when you cast the item on somewhere click the hotkey again almsot simotaniously. You should be able to cast again without cooldown.
Not much seeing it only has a two or three second cooldown but its something that Blizzard didn't intend and can be sorta usefull...
Don't have video proof or screenshot but will someone confirm for me?