Idk about amethyst and primal but in nostrudel you could make a list of users and follow that list

https://algo.utxo.one from nostr:npub1utx00neqgqln72j22kej3ux7803c2k986henvvha4thuwfkper4s7r50e8 might does this. Unfortunately I couldn't try myself so far (not supported by my client).

This is possible, but it will require the use of a separate Nostr app called listr.lol by nostr:nprofile1qythwumn8ghj7un9d3shjtnswf5k6ctv9ehx2ap0qyvhwumn8ghj7un9d3shjtnndehhyapwwdhkx6tpdshsz9nhwden5te0wfjkccte9e4x2enxvuhxv7tf9uq3zamnwvaz7tmwdaehgu3wwa5kuef0qy88wumn8ghj7mn0wvhxcmmv9uq3samnwvaz7tmxd9k8getj9ehx7um5wgh8w6twv5hszxthwden5te0wpex2mtfw4kjuurjd9kkzmpwdejhgtcpzdmhxue69uhhqatjwpkx2urpvuhx2ue0qy2hwumn8ghj7un9d3shjtnyv9kh2uewd9hj7qg6waehxw309aex2mrp0yhxwet5v9kxy7fwvdhk6tmkxyqzq9eemymaerqvwdc25f6ctyuvzx0zt3qld3zp5hf5cmfc2qlrzdh0h075x5 .

Go there and make a list of the npubs you consider your "close friends." You can have each entry on the list considered "private" so other users won't be able to see who they are, but at least one entry will need to be "public" in order for the list to show up in Amethyst.

Once your list is saved with all the npubs you want included, pop back over to Amethyst and at the top of your home page, tap on "All Follows" and the list you created should be displayed as an option to select.

Now you have a feed with JUST those npubs' posts.

Slay your heroes, follow your friends.

➡️ Hard work, but #Nostr is a opportunity.