In this passage the 1852 LDS edition accidentally switched the order of “preachers and teachers” to “teachers and preachers”. The 1920 edition restored the original word order to the LDS text, undoubtedly by reference to the early editions. This is the only example in the entire text where preacher(s) and teacher(s) are conjoined, so we must therefore rely wholly upon the earliest textual sources in establishing the word order here.
Summary: Retain the original word order “preachers and teachers” in the Words of Mormon 1:16.