It's a bit tricky to draw definitive conclusions about what is aether and what is dynamis at the moment. Prior to 6.0, we were all running on the assumption that natural phenomenon were the byproduct of aether. Now we've encountered a major paradigm shift, and even seen that dynamis can give rise to life itself. I would expect aetheric studies researchers to be looking for a unifying theory to reconcile the differences between these two systems. If aether and dynamis are both forms of energy, is there a conservation law governing them both? Are there actually circumstances under which you can convert one to the other? The characters in game currently think you can't, but is there something out there that we just don't know yet?

As a case in point, the Twelve were transformed over time by our beliefs around them, despite not being primals and not being created by us (Dalamutt being one such example). In turn, they have brought our prayers to them back to the planet and its lifestream. On the surface, this sounds like abstract sentimentalism, but I can't help but wonder if there's a deeper significance in giving our 'hopes to the star'. It does seems like prayer does have a dynamis-mediated effect, at the very least. In Ultima Thule, we use the Scions' prayers to create a dynamis-mediated barrier to survive Ultimate Fate. Is it possible that the emotions and experiences of the living get transformed into fresh aether over time through the cycle of souls? Does the star actually need us to experience these things to keep running? In short, are these truly two disconnected systems of physical laws that never intersect, or is there one overarching system of rules that governs both dynamis and aether as part of a grand cycle that we haven't yet identified?

I have no definite answers to any of these questions, but I personally think it's best to keep your mind open and see how the writers explore the two concepts in the future. Our attachment to theories and laws aren't as important as their ability to explain our findings. I think the safest answer to 'What is dynamis-mediated' right now is 'I don't really know,' (but I'm definitely curious).