An auto mechanic needs to be able to diagnose a wide variety of sounds in a car that is not running well. The same is true of a great deliverance team.
These articles will point you to a handful of specialty issues. First will be the diagnostic skill, so you can recognize the problem and address it. Second will be the tools to address it.
No auto mechanic ever has enough tools! And every new generation of cars creates new diagnostic dynamics.
The same is true of spiritual warfare. We are always learning.