Extreme Networks

Would like to clarify that in order achieve ap load balancing, the member APs must be assign to the same network policy? And using the identical radio profile?  Refer to the attached image, to achieve the AP load balancing with the same color of AP, ...

Currently manage to retrieve the total count per AP (sum of wifi0/wifi1) via ahClientCount, is there specific OID to retrieve the client count by individual interface? thanks for sharing.