I’m all in for testing it out, but where to begin?
A hybrid clearnet and tor model like pivx uses would be good to test. If the .onion nodes will have issues they will just get banned, which is not such an issue(?).
I guess the registration TX should allow onion v3 addresses? But also Tor has some issues with firo, even after the last update (which mentions tor to be updated), there is no way to get a .onion address in firo, I opened a seperate topic here: Firo and Tor (.onion address)
Until this works reliably there is no way forward with this idea anyway…