Like you, and probably a large number of others, I use some fishing equipment on airplanes. Crimps and wire for airplane leadouts in particular. The deep sea crimps are very heavy walled and will not fail. I always make sure the wire I get is multi-strand. As a point of interest, Seven Strand makes a lot of deep sea wire and I see it also used as control lines.
You can also get the multi-strand wire "coated" in a plastic sheath. I have used that as well. Thus far I have seen no real difference in the sheathed or unsheathed.