Help with path-based rules

Hi,

We have a very custom WP website that uses AO + CriticalCSS powerup (website is http://www.goodhire.com).

The problem is that the website does not properly register 404s. So every request to a page that does not exist generates its own custom path-based CCSS rule. Eventually this breaks the user interface for the CCSS powerup.

We have created a pretty extensive “Add CSS to all rules” CSS that covers most pages. Can we create a manual path-based rule using that CSS that would basically apply to every page on the website, thus stopping the creation of all of these unnecessary path-based rules?

Or alternatively, can I use the “Edit Default Rule CSS” to prevent new path-based rules from being created?

Thank you,
Ben