Hello Ergo,
Thanks for writing in!
If you will update to the latest version of the X theme and Cornerstone, we have combined and minified the JS files into:
/wp-content/plugins/cornerstone/assets/dist/js/site/cs-head.{6466c24}.js
/wp-content/plugins/cornerstone/assets/dist/js/site/cs-body.{6466c24}.js
/wp-content/themes/x/framework/dist/js/site/x.js?ver=3.0.1
where {6466c24}
will vary because this is dynamically generated.
I would recommend that you deactivate the Autopmize plugin and other chaching plugin temporarily so that you can inspect your site in Chrome developer tools to find out the different JS filenames and other resources being loaded that you want to exclude.
Hope this helps.