Something we used to do on other rides to unload the shock for adjustments like this:
You sit on the bike and compress the coil-over assembly. While compressed you insert two "U" shaped metal clamp over the springs spanning from one end to the other. This isn’t thin tin, it has some substance like ¼” thick steel at least ¾” wide. In each case the custom clamp is made to fit each spring.
This is not for everyone, but for people who adjust often it might be worthwhile;
You sit on the bike, collapse the spring, insert spring clamp (15 seconds). Get off the bike, adjust collar (it has NO load on it now), sit on bike, remove spring clamps. You could be done in as little as minute.
Hint we taped the ends up so they wouldn’t knock the coating off the spring.
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The ends must be curled like above to stay on the spring and not fly off. With some strap steel and torch these can be made in 15minutes. Of course the ends would actually be rounded like the spring for best fit.
Keep it in mind. Let me know if you have questions.