If you properly fit your chains, the only extra links are on the outside...... But then pre-fitting chains are above a lot of folk pay grade.
I do pre-fit, but 99% of the time, I am putting chains on in less than ideal conditions. Leaving some extra links helps get them on, drive a little, then re -tighten. I would rather tie an extra link or two than fight them. Plus I can use them for a couple different vehicles with slightly different tire sizes.
I assume that you're speaking from experience when referencing the blue circular ones, so I'll take your advise and pick some of those up. What length are you running in the black ones, and how many per tire?
I usually run two per tire. Essentially grabbing every section in between each cross link. I have also had a couple break on me in extremely cold weather when installing. Grab a couple extra.