Exactly. Paul taught some nice to know stuff but basically his teachings are not essential to salvation.
The gospel that is the power of God to save you is Paul's gospel declared in 1 Corinthians 15:1-4 KJV!
Romans 1:16 For I am not ashamed of
the gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek.
...
Romans 16:25
Now to him that is of power to stablish you according to my gospel, and the preaching of Jesus Christ, according to the revelation of the mystery, which was kept secret since the world began,
Romans 16:26 But now is made manifest, and by the scriptures of the prophets, according to the commandment of the everlasting God, made known to all nations for the obedience of faith:
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1 Thessalonians 3:2 And sent Timotheus, our brother, and minister of God, and our fellowlabourer in
the gospel of Christ, to establish you, and to comfort you concerning your faith:
You need to change your mind about Paul's gospel because God shall judge the secrets of men by Jesus Christ according to it!
Romans 2:16 In the day when
God shall judge the secrets of men by Jesus Christ according to my gospel.
If there's never been a moment in your life when you trusted the Lord believing IT, you are outside the faith (2 Corinthians 13:5 KJV) and are also in NO POSITION to be talking about what is essential for salvation or not as you believe not the glorious gospel of Christ (2 Corinthians 4:3-4 KJV) that is the power of God to save!