I've recently started using a self hosted SearXNG instance but I'm still using the search engines enabled by default (google, duckduckgo and qwant). What search engines do you have enabled or which ones do you feel you've gotten the best results with?
I just define my own bangs. Both Firefox and Google let you set up custom search engines easily. For example I just type d bag of holding into my URL bar and it searched my favourite D&D reference site. Faster, private and I can select whatever search engine I want for regular search.
That's good to know! And I'm sure it's beneficial information for those that were unaware of that. However, (unless I'm wrong) the method you described requires you to be deliberate and precise in the placement of your own bang; i.e. bag of d holding or bag of holding d wouldn't work. As I often just start typing whatever I want to search/look for and only notice midway/afterwards that I hadn't specified where I would like to search, the built-in 'bangs' in Firefox/Chrome just wouldn't cut it unless I would try to rewire my behavior.