Here the 1830 typesetter replaced the plural strifes with the singular strife. In accord with the reading in 𝓟, the 1908 RLDS edition restored the plural to the RLDS text. As explained under Alma 1:32, the original text almost always has the plural strifes whenever it is conjoined with other nouns in a list, as here in Alma 4:9. The critical text will restore the plural strifes in this passage since it is the earliest extant reading.
Summary: Restore strifes in Alma 4:9 since the earliest textual source has the plural; examples elsewhere in the text support the plural strifes in this context.