Good news, we've added a "Slowest assets" section to the "Performance" tab of Raygun Pulse (Just below the "Slowest pages" section. This will help you identify the laggiest assets for your application.
As a side note, if you are interested in further optimising the performance of your public website, we are currently running a closed beta for a new Pulse feature, that analyzes your web pages for performance issues and gives you a list of actionable tasks you can do to improve the customer experience of your application.
If you'd like to try it out for your public website, just send us a message and we will be in touch with more details.
Zheng from Raygun