In no place in the book of Ephesians does Paul even mention the word "tongues". When he says we should pray at all times in the Spirit, he IS NOT speaking of the sign gift of tongues. I know this not only because of the context of the passage but because he said in his letter to the Corinthians that not everyone speaks in tongues, not everyone has that gift and that the OTHER gifts are more to be desired because they edify the church.
One more point WRT those that lure people in by a manifestation of miracles of tongues, God said, "Behold, I am against the prophets, saith the LORD, that use their tongues, and say, He saith." (Jeremiah 23:31) The Bible is our authority, NOT self-proclaimed prophets. And it is the ONLY offensive weapon in our spiritual armory.
Another excellent Spiritually summoned Scripture!
Let me suggest, though, a minor correction of major import to your contention: My Bible is not the Sword of the Spirit. It is just ink on paper. In Eph. 6:17 the Sword of the Spirit is the Word of God; the spoken Word of God, the "hrema," not the "graphe" -- though the graphe is very important to communicate words that can be spoken.
I believe that the Sword of the Spirit is the "graphe" memorized word by word, and wielded by the battler in Spirit, to slice through the words of a fibber and fool. It was exemplified exactly by Jesus in the Temptation when contending in the Spirit against the Tempter. Every word. That was not battling in the flesh. (The other offensive weapon is, of course, prayer, as you mentioned.)
Satan uses both tongues and twisted Scripture. However:
Jas 4:6-7 But he giveth more grace. Wherefore he saith, God resisteth the proud, but giveth grace unto the humble. Submit yourselves therefore to God. Resist the devil, and he will flee from you.
Resist the Devil and false humility! Good for your comment!
Eph 6:10 Finally, my brethren, be strong in the Lord, and in the power of his might.
Having done all ---- stand! Praying for a victory --