Use 2 paid relays as Read/Write relays, like

Azzamo

Azzamo | Web Hosting, Bitcoin Payment & Nostr Relay Services

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https://jellyfish.land/ or

nostr.wine Relay

The most reliable paid relay on nostr.

Use 1 popular and free relay as Read/Write relay Use a few free popular Relays in only-read mode, like relay.damus.io, relay.primal.net or nos.lol etc. Use 1 inbox relay for DMs Extra Points for a local relay for backups.