I have confirmed empirically that ANI on AP will work the best when RX readings (signal from CPE) are at similar power (I have them at -68 to -58). When range becomes wider, -68 to -40 ANI stops producing any positive results in noise floor readings as well as CCQ.
Interesting.
I generally try to keep all of my clients rx at the tower around the same when ever possible. A spread from -38dB to -85dB is a huge difference. I figured it can’t hurt, nice to hear I figured right.