Need an expert to optimize the website. Need 90+ results on PageSpeed Score and Yslow on Gtmetrix. And 80+ score in Google Page Speed Insight.
Only if you can achieve without changing site functionality only then project will be consider as done and payment will be made.
Also I need track (what & where) of all changes you made.
Note: Site is huge, loads poor, have lots of pages, using DIVI theme in WordPress