The Unleashed Administrator guide is found by clicking Help in the top/left of your browser window: http://docs.ruckuswireless.com/unleashed/200.2/index.html
Its recommended to statically assign IP addresses to your APs, with one chosen as the Management IP
so you can always reach the active Master AP when you open a browser (or define a local DNS hostname).
Assign static IPs outside of the DHCP scope used for clients.
The internals of new Master AP selection is complex, but instantaneous in release 200.2 and later.