1) The Holy Spirit
3) Boldness in the Jesus' Name
Some Outside Resources:
Boyd, Gregory A. "God at War: The Bible and Spiritual Conflict" (IVP)
Kraft, Charles. "Defeating Dark Angels: Breaking Demonic Oppression in the Believer's Life" (Regal)
Kraft, Charles. "I Give You Authority" (Chosen)
Kraft, Charles. "Christianity with Power: Your Worldview and Your Experience of the Supernatural." (Wipf & Stock)
Rankin, Jerry. "Spiritual Warfare: The Battle for God's Glory" (B & H Books)
All of these authors have accredited doctoral degrees and have extensive experience!
Other believers who have experienced spiritual warfare!