When I first engaged with this thread it was with the acknowledgement that I can't claim to fully understand powerscaling, because I will admit I am one of the people who thinks of it as "divorcing a character from who they are and just imagining their abilities". So I'm genuinely interested to hear how your analysis here takes into account character motivations?

Like, surely Droog didn't WANT to destroy the entirety of Derse, or indeed anything beyond Derse, when he used the Ring of Void's Miles? Was he not specifically countering Dirk's rebellion? You assume that this is an indication of Droog's limited power AND range when it surely makes just as much sense - if not more - to presume Droog was deliberately limiting his own power and range. In a similar vein, how are we to assume that Jack didn't only use the 3-ring to destroy some of the Battlefield and Prospit because that's all he wanted to destroy? Your interpretation of the scaling Red Miles seems - to me at least - to rely on the assumption that every time someone uses the Miles they must necessarily be expressing the Miles' full power and range, which comes across to me as not only a limitation of powerscaling, but also dishonest to the way the Miles are actually used in the comic. Remember Jack spends several hours destroying each of the trolls' planets one by one (using the Green Miles, btw -- strongly implying he can choose to power up his Red Miles with Becquerel's power, but does not always do so!) before he finally decides to turn them on the Genesis Frog itself... Jack's motivations are those of a killer and are not always 100% clear, but he does seem to operate on his own logic of escalation, choosing to take out smaller targets before moving in for the really big kill, and this does not necessarily mean it is his powers which are getting stronger each time. (Your logic that he's not able to beat the Striders until his fourth form is sound, but I don't think it works as an explanation for the Miles specifically because it's not ultimately the Miles he uses to win the fight).

And most crucially to me, the point of the Red Miles is that it performs the function of a Queen's attack patterns in chess - that is to say that its key advantage is its reach and its precision. Hell, maybe it makes sense for a Queen's attacks to get physically stronger as she levels up, but the crucial strategic advantage of the Queen in chess is that she can reach anywhere on the board, but may make shorter moves if she chooses to do so.

I also fully understand your logic when you say we "see on screen the Red Miles spreading [...] and destroying entire galaxies", but I still think there are holes in your assertion that this somehow scales Bec Noir up to a multi-galaxy-destroying level on his own. Like, as I've discussed above, this still doesn't prove that a 3-prototyped Jack, or any other carapacian holder of the Black Queen's ring, couldn't have performed the same feat - as far as the reader is concerned, the only reason 3-Jack didn't destroy an entire universe is because there was no universe sitting there in front of him to destroy. And I think that treating a universe (or "multiverse", if that's what we're saying it is for the purposes of this discussion) in Homestuck as if it were the same as a universe in any other work of fiction does, by its very definition, strip away some of Homestuck's important thematic elements for the sake of powerscaling. Like, doesn't the fact that the "universe" he's killing is actually just a giant, passive organism still count for something? To count as a universe-killer, does he actually have to "destroy" the whole universe (which for the record he didn't do - on p. 4307 we can see not just a whole bunch of universal goo left over but a whole frog's hand still floating around the site of death), or does he just have to cease the universe's functions as a living life form? Using Cascade as our point of reference, these events also seem to suggest - if not outright confirm - that a universe can have a heart. Can you scale to universe-killer just by finding the universe's heart and putting a bullet through it? In which case doesn't Spades Slick, or whoever happens to be holding the cueball gun at a given time, also scale to killing universes? Both Jacks in Cascade did essentially the same thing: they found the living embodiment of a universe and happened to be holding the right weapon at the time to kill it.

I don't think that's a disingenuous misinterpretation of the text, I think that's pretty much the outright intention of the circumstances being depicted to us in that way!