Best plugins for WPO

Hello,

We are looking for solutions to improve the loading speed of our website which uses generatepress (although it uses a child version).

We have tried several plugins like W3 Total Caché, Asset Clean UP, Fastest Caché,… but we don’t see optimal results.

Any recommendations of plugins that can improve the score? This is the web.`

The page I need help with: [log in to see the link]