A structured network strategy to sync Nostr relays I think can greatly help the persistance and reliability of messages. Negentropy is a huge help. For example, if all admins independently run relays and have write policies exclusive to members/admins, the relays can sync and secure only those messages between each other. Strfry has some support here with a router. However, last I remember, the features were new and could be optimized. I would need to look again.