Unfortunately this would basically require getting every power in the game and testing it, or getting it out of a GM with access to the database, as this information is not contained anywhere in the client. Neither is really a feasible option..
I do have a list I saved from the EdenII forums made by RedComet in the
Odds and Ends section with the exe and cooldowns for Bow stance powers, but for other stances I can't offer much help.
