In your warehouse environment, use full power, and locate your APs on opposite ends of the racks for best coverage.
Avoid mounting them near any obvious source of interference like machinery, lighting, heating/AC vents, etc.
You don't get the real-time channel control that being managed by a ZD provides, but if you reboot your APs once in
a while, they will always choose the best channel found when they restart, or you can enable Channelfly for a specified
period of time before turning it off.