Hi Theo,

I hope you are having an awesome day and thanks for contacting us regarding your query.

There isn't really a recommended cache plugin for Salient, however, you may check out the article linked below for the best cache plugins:

https://www.designbombs.com/top-wordpress-caching-plugins-compared/

Please let me know if there are any more questions that I may answer for you :)

Cheers!