Isaiah 10:33 (King James Bible) and the high ones of stature shall be hewn down
The 1888 LDS edition has the singular one, apparently a typo. This edition was not used as a copy-text, and so the error was not transmitted into subsequent LDS editions. The choice of one was perhaps influenced by the singular bough in the preceding clause (“the Lord of Hosts shall lop the bough with terror”).
Summary: Maintain in 2 Nephi 20:33 the plural ones, which agrees with the King James reading.