I find
(stripped) wire-wrap wire to be useful for this sort of thing.
It's thin, and soldered easily.
I think I've got some of that (though I'll be buggered if I can remember
where it is). 40AWG with either blue or green insulation, IIRC. Really
thin stuff.
It's normally 30AWG, I think. I find it's useful for making links on
stripboard too, it's thin enough to run round the IC sockets neatly, you
can put 2 wires in one hole (or a wire and an IC socket pin in one hole)
if you're short of space, and it solders well.
Of course I als use it for wire-wrapping, modifying DEC backplanes [1]
and the like.
[]1] I always make the NPG jumper using a distinctive colour of wire
(often red), so I can find it easily if I want to remove it.
It's a pity Maplin no longer sell it. It was useful just being able to
pop into the shop and buy a couple of reels.
-tony