What nostr needs is not a WoT algo. An algorithm is an interpretation of data, so that responsibility belongs to clients. What nostr could maybe use is more data. What we currently have:

- Follows

- Lists

- Reports

- Reactions

- Labels

- Reviews

I wouldn't mind seeing new ways to specify explicit delegation of trust, particularly with reference to specific domains (fiction books vs health recommendations for instance). But specifying an algorithm would be centralizing, and is a bad idea.