Mind you, this is written by a non-Charismatic! Further, he is correct—on both counts: demonic strongholds are a biblical concept. And, most important to remember for those who want to lay out a roadmap, we aren't given the details. Nor should we spend a great deal of time trying to develop a roadmap. It's a distraction from the task of living a godly life and shining in the corner of the world where God placed you.
3 By his divine power the Lord has given us everything we need for life and godliness through the knowledge of the one who called us by his own honor and glory. 4 Through his honor and glory he has given us his precious and wonderful promises, that you may share the divine nature and escape from the world’s immorality that sinful craving produces. (2 Pet 1:3–4 CEB)What more do we need?