First, in Matthew 16:18, Jesus said he would build his church (his community of called-out people). He is the architect and he engineers its growth. It’s an indestructible community, for he said, “the gates of hell shall not prevail against it.” Christ’s church has something to do with life and death, and the good news of rescue both locally and globally. But how does Jesus build his church?
Second, Ephesians 4:11-16 is a single sentence with a subject and a verb. Christ (the subject) gave (the verb) something to the church, and those gifts are to result in its growth. The emphasis of Jesus and Ephesians 4, and therefore the emphasis of verbally gifted leaders, is love and unity (John 13:34-35; Ephesians 4:2-3, 15-16). Doctrine certainly matters (Ephesians 4:4-6), but love-deficient doctrinal separatism was rebuked in the church at Ephesus (Revelation 2:1-7).
Church growth is not really a secret. Jesus said, “just as I have loved you, you also are to love one another. By this all people will know that you are my disciples, if you have love for one another” (John 13:34-35).