1 RT-AX89X in basement and 2 x RT-AX92U routers running as nodes. One AX92U on 1st floor and the other on 2nd floor all connected to each other by CAT6 ethernet..
2 x RT-AC87U routers. Main one in Wireless router mode, and the 2nd in Access Point mode.
Now using the ZenWiFi AX (XT8).