Nobody can advise that you have to choose, and integrate it with a disease plan. That’s the only reason order of stocking would matter, lots of reefs have been set up with fish first or last, CUC first or never added at all (I don’t use them at all) but the disease plan controls what order of things you add.
See this link for one example of adding fish very last:
Fish seem to be the main cause of disruption in a display tank, given the current circumstances in the hobby with pests (ich, velvet, parasites, etc.). I have been in this hobby for 18 years, and the amount of pests that are showing up lately is much more (could also be the fact that we have...
www.reef2reef.com
If you want to integrate a disease prevention plan into your stocking you’ll have to study jays disease forum here on the site, but that link above is one way to control order of stocking with a disease plan in mind.