People's views of what spiritual warfare is really affect the quality of the company you find yourself in when that comes up. I've met both meditational and praying practitioners who think its's all a matter of what angels do, including the fallen angels, but I also know this one guy who quoted Saint Paul on principalities and powers without understanding what that meant in Paul's context. Poor Paul! He spent his life on trial in a Roman court, wherein principalities and powers literally meant states and laws. A principality is a place like Wales, and a power in that context is a written legislation. Like the War Powers Act, remember that argument?
Some of those Angel studies people are kind of strange, man. I mean, I fully understand that in Revelation, the Angels are of the churches and that the seven churches have locations by city, but if you've ever been there than you know that it can get weird.