Would the Mojo be a good pairing with the Aeon 2 Closed? I don’t know from first-hand experience. I just mention this because it’s been said that other iterations of the Aeon headphones have needed a good amp (I’m not sure if this is for current or for power). See here, for instance.
The Elegia might be better served by the Mojo, as @andris noted. The Mojo’s dark character might offset some of the brightness Pharmaboy observed. Again, I’m not speaking from first-hand experience. Sorry.