If you want to exclude certain channels from consideration:
(like channels 2,3,4,5 and 7,8,9,10)
Assuming you're using a ZoneDirector:
Go to Configure / Access_Points / Access_Point_Groups and edit the "System Default" entry.
Under "Channel Range Settings": uncheck the undesired channels.
ChannelFly should now only be able to choose channels 1, 6 and 11. (on 2.4Ghz radios)
If you have excessive "interference detected" log messages on 5Ghz channels (and you suspect there is interference from non-ruckus APs) you can try the same trick there.
Beware, though:
If your interference is from other Ruckus APs (managed by the same controller) then eliminating the 5Ghz "problem" channels will only move the problem to another set of channels.
Re: ChannelFly in general:
If you're in a clean/"controlled" environment where you own+manage all the APs, you may not need it. (and a 1,6,11 strategy probably makes sense)
If you're in a noisy/congested environment where you do not control al the APs and interference comes from many distant APs (or non-WiFi devices) then ChannelFly and non-standard channels may be optimal for you.
(that's my opinion)