· Literary Style: Revelation employs symbolic language and imagery. The shift might be a literary device to create a specific effect.
Hiddensevant, you’re right in the first instance. On the other hand, the shift might just be part of normal Koine. I know of no-one making such a distinction or placing special emphasis on the collective singular and plural used in the same passage. I see it was quite frequently used in Hebrew, and with John’s Semitic background, it follows that he would have used it as part of his speech:
Number is a grammatical feature of nouns that does not always correspond to extra-linguistic reality. For example, collective nouns are singular nouns that refer to more than one object, e.g. עוֹף (birds) and הָעָם (the people).
Christo Van der Merwe et al., A Biblical Hebrew Reference Grammar, electronic ed. (Sheffield: Sheffield Academic Press, 1999), 182.
. גְּוִיָּה n.f. body, corpse — 1. living human body (sg., of many persons); of man in Daniel’s vision (body apart from extremites); also of the living creatures in Ezek.’s vision. 2. dead body, corpse, carcass: a. of man (sg. of several persons); collective; b. of lion.
Richard Whitaker et al., The Abridged Brown-Driver-Briggs Hebrew-English Lexicon of the Old Testament: From A Hebrew and English Lexicon of the Old Testament by Francis Brown, S.R. Driver and Charles Briggs, Based on the Lexicon of Wilhelm Gesenius (Boston; New York: Houghton, Mifflin and Company, 1906).
You stick to AI, I stick to reliable sources. I go for the two witnesses displaying the spirit of Moses and Elijah. They will function as God’s spokesmen, similar to Moses and Aaron (Rev. 11:3-6; cf. Ex. 4:10-16). Based on the miracles they are to perform, they will be like Elijah (commanding fire to devour enemies and shutting up the sky so that it does not rain, Rev. 11:5, 6; cf. 1 Kings 17:1; 2 Kings 1:10–14; James 5:17), and Moses (water turned to blood, the earth smitten with every plague, Rev. 11:6; cf. Exod. 7:20; 9:14; etc.). At this stage we do not know the identity of the two witnesses, so you are allowed the benefit of the doubt. But it’s going to be a hard act to follow with an unpleasant outcome. Time will tell whether you are chosen and have what it takes.
However, I do think your thinking will remain stunted by clinging to the Watchtower as God’s chosen nation. You’ll have to broaden your horizons. At this stage, JWs don’t feature at all. Jesus said: “Most truly I say to YOU, Unless YOU eat the flesh of the Son of man and drink his blood, YOU have no life in yourselves. He that feeds on my flesh and drinks my blood has everlasting life, and I shall resurrect him at the last day” (John 6:53, 54 NWT). This means that the majority of Witnesses 'have no life in themselves.'
As to the sealing of the 144,000, according to the context, it is to be a future occurrence. The transition between chapter 6 and 7 of Revelation is introduced by the Greek phrase Καὶ μετὰτοῦτο (Rev. 7:1 Tischendorf’s New Testament, 8th edition; cf. NA28 footnote), “and after this,” “this” referring to the breaking of the sixth seal, specifically the kings of the earth and their followers, finding refuge in their underground shelters. Those claiming to be of the anointed are either liars or seriously deluded. If you insist on following their tenets, be my guest, but I see no future in them or their organization.