The whole not focusing on skrying was the key there (IMG:
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The subelemental uses as in the angels of Transportation, Healing, precious metals and stones etc? Aside from that they do not discuss sub elements.
I beleive the angels from the above example and the other sub elemental areas are actual, not metaphorical. Also, healing for example is not under one sub element as in modern magics, the angels are from all 4 of the different elemental sections.
Athena