I have shared shell-scripts for multiple Ruckus APs.
If you need a repeatly work, you can use those.
And If you need upgrading f/w of multiple at once, you have to install ftp and upload f/w and rcks into ftp server based centOS.
You can downloading via below google drive.https://drive.google.com/drive/folders/1PFnwJtRmMRsWhABJoIPmqQAnBPVMNe27
See HowTo.txt to use.
If you have better script, share me those. My email is [email protected]