As a note, did a bit of investigating to see what Boney was using as definitions of Cardinal, Elemental and Mystical. The paradigm you;re after would be Mystical I think. Elemental is the straightforward application (plants for Ghyran, Beasts for Ghur, Fire for Aqshy), Mystical is the metaphorical application (growth for Ghyran, confusion for Ulgu, anger or passion for Aqshy) and Cardinal is sort of negative space defined by looking at the Winds as a whole (dusk and dawn for Ulgu is the example Boney gave). The Colleges apparently don't like Cardinal, as it limits each Wind to it's strengths, rather than stretching them to allow for as much stuff as possible.