In the upstairs of my house I have an ARRIS SURFboard SBG6700-AC modem router combo. This is hardwired to a TP-Link TL-WA801ND. They are all set up to the same SSID, including both channels from the router. After some unsatisfactory speeds, I have come to realize that combining an N and AC router/access point might not be the best idea. What would be the best way to set up the channels on the router and connect to the access point. We have a wide variety of electronics from phones to laptops to an XBOX.