Nowhere. You are trying to make an argument that doesn’t exist. Christ alone fulfilled the law, but he has always worked through prophets. His church organization is the same today as it was when He was here. As stated here in Ephesians, his servants are that we might have unity in the faith, unto a fullness in Christ, not instead of Christ.
Ephesians 4:
11 And he agave some, apostles; and some, prophets; and some, evangelists; and some, pastors and teachers;
12 For the perfecting of the saints, for the work of the ministry, for the edifying of the body of Christ:
13 Till we all come in the unity of the faith, and of the knowledge of the Son of God, unto a perfect man, unto the measure of the stature of the fulness of Christ:
Not from how I see it. You are saying that belief in Christ as the Savior and His death wasn't good enough for salvation. You've added on the ADDITIONAL "requirement" that one has to BELIEVE IN Joseph Smith. Christ never said that belief in Him wasn't good enough. LDS did.
BTW, which parts of Ephesians are “okay” to use?
I was told that “THE BIBLE (which means all of it) IS A SANITARY VERSION.” That means the Bible, all of it, is in error. I was also told there are “ omitten [sic], distorted, or deleted...passage[s].”
So....which “parts” of the Bible can be relied upon?