I would also remove DuckDuckGo Privacy Essentials. It is redundant if you are using uBlock Origin.

This has already been recently discussed here.

I don’t think that it captures everything, but according to the Arkenfox project, any additional benefit ClearURLs could have compared to this setup is minimal, and thus, it probably isn’t worth to install another extension.

ClearURLs is not really needed anymore since you can enable AdGuard URL Tracking Protection and import Actually Legitimate URL Shortener Tool to uBlock Origin.

Skip Redirect is still fine if you want to continue using it but Smart Referer could be replaced by changing network.http.referer.XOriginPolicy in about:config to 2 like the Arkenfox project recommends. However, note that there could be some issues regarding this setting, so keep that in mind.