Hello Sir,
I have read your requirements, i am an experienced Wordpress developer and expert Wordpress website speed optimization, I can get score of 85+ to 90 btw with average loading time of 3s to 2s on gtmetrix or google page speed insights or pingdom tool,
By follwing these steps I can assure i can definitly incrase speed of your existing website.
? Optimize images
? Add Expires headers
? Enable gzip compression
? Leverage browser caching
? Defer parsing of JavaScript
? Minify CSS, JavaScript, HTML
? Reduce server response time
? Use a Content Delivery Network (CDN) = However, I don't believe in it!
? Eliminate render-blocking JavaScript and CSS in above-the-fold content
I provide actionable CDN (content delivery network) advice and support for further improvement
Please Message me and give Positive response regarding this project.
Thanks.