[DT SPOILERS] Just some thoughts

[Alenore]

Not entirely correct, Sphene herself says that it responds to fervent desires/strong wishes, and the lessons on the Milalla reaffirm this in that they prayed to it and their prayers invoked it to transport them to the Alexandrian reflection away from the southern sea isles, which to me at least sounds like it works on Dynamis over aether

Magic was originally found on the Source through prayers during the Second Umbral Calamity.
Summoning usually uses the wishes of the summoner(s) to manifest an entity.

Just because there's a prayer and wish involved doesn't make it dynamis.
Aether is also used for multiple other skills touching emotions and feelings : bard skills, dancer (the Totentanz might be, although it's still described as aether), sleep spells being a calm emotion, for instance.