As discussed under Omni 1:17, Oliver Cowdery made several corrections to the printer’s manuscript with heavier and darker ink ﬂow for this part of the text. Here in verse 23, Oliver corrected his initial spelling Ameleki to Amaleki. Elsewhere, Oliver consistently wrote the correct spelling, Amaleki (twice in this book, earlier in verse 12 and later in verse 30, as well as twice in the Words of Mormon, in verses 3 and 10). Undoubtedly, the original manuscript (no longer extant for any of the book of Omni) read Amaleki, and here in Omni 1:23 Oliver corrected 𝓟 to agree with 𝓞.
Similarly, Oliver Cowdery omitted the infinitive clause “to see his death” when he initially copied the text from 𝓞 into 𝓟. Obviously, the clause “and I have lived” is incomplete without this infinitival complement.
Summary: Maintain in Omni 1:23 the corrected readings in 𝓟: the spelling Amaleki and the inserted infinitive clause “to see his death”; these readings undoubtedly reﬂect the reading of the original manuscript, no longer extant here.