Just for clarity, all my Ring devices (cameras, alarm, lights) connect flawlessly to the RT-AX86U, it is that just 3 of them, out of 25 Ring devices, for a total of 42 devices at home, are on the edge and with very low RSSI. I am trying to avoid having to add an AiMesh device, therefore trying to optimize the new one I have (RT-AX86U), or replace it with something with a little bit of more coverage, for those 3 edge devices.