Once you feel comfortable with your presuppositional apologetics you can incorporate it into your preaching and evangelism by casting down the philosophies of men and doctrines of devils. We are to bring every thought into captivity to the obedience of Christ by overthrowing these philosophical strongholds. 2 Cor.10:3 For though we walk in the flesh, we do not war after the flesh: 4 (For the weapons of our warfare are not carnal, but mighty through God to the pulling down of strong holds;) 5 Casting down imaginations, and every high thing that exalteth itself against the knowledge of God, and bringing into captivity every thought to the obedience of Christ;