𝓞 is not extant for the subject pronoun he, but spacing between extant fragments supports its occurrence in 𝓞. When Oliver Cowdery copied from 𝓞 into 𝓟, he initially omitted the he, perhaps because the he was redundant, given that there was already a subject, Jacob, for the predicate “led the Lamanites forth to battle”. Later, probably when he proofed 𝓟 against 𝓞, Oliver supralinearly inserted the pronoun he (the level of ink flow for the correction is somewhat heavier). For other instances of this kind of redundancy, the subject pronoun has often been edited out, but not always. For some discussion and examples, see under Mosiah 16:5. Also see the general discussion under subject repetition in volume 3.
Summary: Maintain in Alma 52:33 the repeated subject, the pronoun he (the probable reading in 𝓞 and the corrected reading in 𝓟).