The whole point of Hermes is its OCXO and superior signal processing.
I would set this up as follows if possible -
Eversolo to Hermes via USB
Elite to Hermes via Coax
Brennan configured as NAS and accessed from Eversolo
Hermes to Pontus via i2s
This achieves what @soix mentioned above. I just don’t know if Eversolo has capabilities to read NAS