Well, I went to war tonight.
Sorry purklize, but I went the Imid route because everything I researched seemed to suggest it was the best. I feel like your method would help diminish the populations greatly, but never 100% kill them because of the ones hanging out in the tray and reservoir.
So I ended up doing 40ml/gallon in a dunk submersion for 2 minutes each on all 12 plants. I definitely got some of the small black ones killed and floating in my green Imid solution. It was harder to see the smaller translucent ones in there, but I'm sure I got a bunch of them. So I did that, then I added 20mL/gallon to my rez's, and I'm running to more times tonight for 15 minutes a piece. I'll go lights out with no feedings, hoping they absorb the Imid good, then when lights on tomorrow, I'll flush and change out new solution.
I'm really freaking out though now. I barely saw about 6 black mature ones come up in all that, and not many of the smaller translucent ones either. It leads me to believe my plants have been infected with some kind of virus, either because of the aphids, or because they already had it and the RA's made it worse. I've heard about Tobacco Mosaic Virus, and similar MV's in cannabis, but nobody seems to know 100% if it's legit.
I'm also freaking out that I possibly have broad mites, which I've heard are even worse than RA's. The reason I say this is because after I ran the Imid flood tonight, I came back when it was dry, and I still noticed a few moving organisms... they were so freaking tiny though, like way tinier than any of those pictures I posted. But they did look similar under my jeweler's loupe.