You could technically just use only 2 relays and be fine in terms of access to #nostr if you used Blastr for sending and UNOstr for receiving.
nostr:nevent1qvzqqqqqqypzp4y6jq36y8d6rv7gxpk2x6dlxfpa3dzt3u9k6yvkvplhkzvsl2xlqyvhwumn8ghj7un9d3shjtnddakk7um5wgh8q6twdvhsz8thwden5te0dehhxarj9ekh2arfdeuhwctvd3jhgtnrdakj7qpq4x47auqn0ay5va3gf9wnn75lvayyvjjc6udk592qdjeuxtumwqrsl3f8pq