That's a really good way of looking at it mate. Im quite hell bent on a yellow watchman and they are from indo pacific so I could follow your rule with Indo fishMy inverts I own are:
- True Peppermint Shrimp
- Turbo Snail
- Nassarius Snail
- Bumblebee Snail
My planned inverts are:
- Clam
- Cerith Snail possibly
- Strawberry Urchin
- Other Indonesian native species
My main bit of advice is try stick with most thing coming from a similar area, it will make a piece of the reef become a literal thing. If you can’t tell with my tank I’m trying to go Indonesian only, this limits me to certain fish but also doesn’t at the same time. The more you research new areas the more fish you’ll find that are actually native to that area of the world.