I am going to suggest that you study the scriptures on baptism more than you have so far. There is no question that Paul is talking about water baptism in these verses that he assumed all his readers had obeyed...
1What shall we say then? Shall we continue in sin, that grace may abound? 2God forbid. How shall we, that are dead to sin, live any longer therein? 3Know ye not, that so many of us as were baptized into Jesus Christ were baptized into his death? 4Therefore we are buried with him by baptism into death: that like as Christ was raised up from the dead by the glory of the Father, even so we also should walk in newness of life. 5For if we have been planted together in the likeness of his death, we shall be also in the likeness of his resurrection: 6Knowing this, that our old man is crucified with him, that the body of sin might be destroyed, that henceforth we should not serve sin. 7For he that is dead is freed from sin.
Now I know that you are trying to say that Paul was talking about some kind of mystical baptism ordinance that they followed that did not include water baptism, but you have not a shred of evidence that they ever spoke about such a concept that did not include the physical ordinance of baptism. What Paul is describing is that spiritual reason why they underwent the act of faith of water baptism and you seem to be focusing on that spiritual reality which is good, but to exclude it from the act of faith of water baptism is an erroneous theory that will not hold up to exegesis on all of the New Testament scriptures on Baptism.
I am afraid you will find yourself alone on this theory and you will probably be coined a heretic if you teach that Baptism in water is not part of the Great Commission.
1What shall we say then? Shall we continue in sin, that grace may abound? 2God forbid. How shall we, that are dead to sin, live any longer therein? 3Know ye not, that so many of us as were baptized into Jesus Christ were baptized into his death? 4Therefore we are buried with him by baptism into death: that like as Christ was raised up from the dead by the glory of the Father, even so we also should walk in newness of life. 5For if we have been planted together in the likeness of his death, we shall be also in the likeness of his resurrection: 6Knowing this, that our old man is crucified with him, that the body of sin might be destroyed, that henceforth we should not serve sin. 7For he that is dead is freed from sin.
Now I know that you are trying to say that Paul was talking about some kind of mystical baptism ordinance that they followed that did not include water baptism, but you have not a shred of evidence that they ever spoke about such a concept that did not include the physical ordinance of baptism. What Paul is describing is that spiritual reason why they underwent the act of faith of water baptism and you seem to be focusing on that spiritual reality which is good, but to exclude it from the act of faith of water baptism is an erroneous theory that will not hold up to exegesis on all of the New Testament scriptures on Baptism.
I am afraid you will find yourself alone on this theory and you will probably be coined a heretic if you teach that Baptism in water is not part of the Great Commission.