I just got an interesting idea, I feel like an idiot doing what I was doing.
So long the board is pretty clean and does not already have large parts on it, you might be able to dip a very thin wire thats long into the thinnest super glue, press it on top of the part across the dielectric, wire it down by twisting the wire over the entire board, solder, remove the wire, and optionally grind away the remaining super glue off the top of the part with your most fine file.
Conceptually it seems easy to align and everything, especially if you stick the part down on some thing mushy (like the silicone tape that is used inside of plasma tv's to hold the screen. Since the wire is very long compared to the part dielectric width you can do hand adjustments to center it properly, if you hold it like a garrote. Huff and puff on the part when you make the right contact to solidify the glue a bit,.
MMm you can do those bastard filters and capacitors this way that have a fucking two grounds, like x2y
like this
I also like using magnet wire to make near bundles for wire-wire joints, you interlock two wires so the fingers go into eachother, wrap it tight with magnet wire, flux it and solder it, and the magnet wire pulls right off and makes a nice tight fillet thats more compact then premade solder sleeves
maybe you can make something like those dental floss plastic things for flossing your teeth without having to use your hands too so you can just tension a part down. Hell this could be useful for QFN even.