Let me help you with what I know..
1st of all.. let me ask.. is the Bible the truth?
I am sure you would agree.. that the Bible is the final authority and only true source of information on both good and demonic powers, and our authority over them.. RIGHT???
SO.. having said that, ANY and EVERY teaching that is not EXPLICIT in the BIBLE is to be taken with a grain of salt!!!
ALSO- if God knew that we needed to know anything other than whats stated in the Bible about dealing w/ demons ect, then he would have made sure that it was in there.. RIGHT???
OK.. let me ask..
How did Jesus deal w/ demons??
How did the Apostles deal w/ demons??
How did demons manifest themselves in the new Testament??
and What is it that is told to us by God in His word for us to do when different things happen????
DO THE RESEARCH AND DONT TRUST WHATS BEEN TAUGHT OVER PULPITS UNLESS ITS BLACK N WHITE IN THE BIBLE!
you have the Holy Spirit to interpret the bible for yourself.
for every attack, there is a promise in the Bible to get us through it and on top. period.
you mentioned attacks in the mind. and yes, the devil can attack the mind.. but what is said that we do about it???
2 Cor 10:
 (For the weapons of our warfare are not carnal, but mighty THROUGH GOD to the pulling down of strong holds
 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;
 Finally, my brethren, be strong IN THE LORD, and in the power of HIS might.
 Put on the whole armour of God, that ye may be able to stand against the wiles of the devil.
 For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places.
 Wherefore take unto you the whole armour of God, that ye may be able to withstand in the evil day, and having done all, to STAND.(not offensive fighting- STANDING)
 STAND THEREFORE, having your loins girt about with truth, and having on the breastplate of righteousness;
 And your feet shod with the preparation of the gospel of peace;
 Above all, taking the shield of faith, wherewith ye shall be able to quench all the fiery darts of the wicked.
 And take the helmet of salvation, and the sword of the Spirit, which is the word of God:
 (here is where the offensive part comesPRAYING always with all prayer and supplication in the Spirit, and watching thereunto with all perseverance and supplication for all saints;
God will answer your prayers for help.. trust him and renew your mind with the truth only from HIS WORD- the bible.
 I beseech you therefore, brethren, by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service.
 And be not conformed to this world: but be ye transformed by the RENEWING OF YOUR MIND (from reading the WORD), that ye may prove what is that good, and acceptable, and perfect, will of God.
 Then said Jesus to those Jews which believed on him, If ye CONTINUE IN MY WORD, then are ye my disciples indeed;
 And ye shall know the TRUTH, AND THE TRUTH SHALL MAKE YOU FREE.
your freedom comes with the truth.. and the truth can be found on your own, with the help of the Holy Spirit, through researching it in His WORD.. the bible.