Yes I agree whole heartedly that things need to be interpreted spiritually brother. And for those of us who have Christ in us, such spiritual discernment is often all that is necessary to find the liberty we need to walk in the Spirit on any matter and find both our peace and a basis for resting in Christ.
However, if we are inclined to make statements of necessity, seeing that we have found liberty by means of spiritual warfare as you have expressed, we may not have a spiritual meaning at all in truth by using the physical attributes of a man's expressions which are in your quote of the Psalms David and do not see that his words are entirely grounded in physical battles yet are necessarily confidently expressed with a spiritual reality of God when we are obedient. If we do that then we miss men all together, or else we assert that men are Satan without understanding what that would mean if we do not make clear from the Scripture how the Lord rebuked Satan whilst speaking to a man (Peter).
For myself, in a prophetic voice, as your own words are set in a prophetic voice, my [our] burden ought to be otherwise. Which is to say we ought to never fail to give a good account of the word of God - otherwise our brethren may take our words to heart on any matter and mistakenly apply a wrong meaning and attribute to men the person and ambitions of Satan who is the father of lies and a harbinger of sin and death.
In personal matters that effect or inclination to speak to men and rebuke Satan as though we were speaking to Satan is a mistaken precept, in a direct sense, because where the man is in Christ he is not Satan at all but a new creature. So to whom are we speaking when we rebuke Satan and then turn away or at least leave our brother or sister bereft of a way of deliverance?
W are not asked to rebuke Satan in his person as a fallen Cherub.The name, Satan is a description of who he became. It simply means God's opponent. And even though he endlessly usurps believers and seeks to trap them - in the instance of Peter's words that led to this rebuke of the Lord, Pater was opposing God by trying to turn Christ away from the cross. So when Jesus spoke those words to Peter He was not speaking to Satan as He did in the wilderness, he was speaking to a man who's words were contrary to the will of God.
That Satan had a hand in this affair of Peter is clear because the Lord then tells Peter that despite his claims of being willing to raise the sword for Christ (warfare) and lay down his life to preserve Christ (courage) Satan had been granted permission to sift him - and that sifting would take place precisely at the hour of Christ's arrest. Peter not only didn't understand these things but he even took a sword to the last supper table and thence into the garden, and even struck a man who was seeking to arrest Jesus.
If we are unwilling to rightly divide the word of truth now that we have come into life, then rebuking a believer as though he were Satan can only cause stumbling. It may very well give us a liberty because we see the hand of our enemy when our brethren or our ex father-in-law seeks to harm our very flesh when he sets about to remove our children from our paternal authority - yet he cannot do it if we go before the Father and evoke our paternity in a supplication with confidence knowing that in the sight of God our children are indeed our children and before Him they cannot be removed. Therein lies true authority for the father of children and not in telling our ex father in law to get thee behind me Satan.
That is all I felt burdened to say to you brother. Nothing more than that.