ok, I’ve iterated by disactivating certain WP Rocket options. I realized “revolution slider” was automatically reactivated due to an update (I think). I deactivated it and score was better.
Others things I’ve changed
– OFF “Combine css files”
– ON “Optimize CSS delivery” with the option “Remove unused CSS”.
– ON Excluded Javascript files with this rule
/jquery-?[0-9.](.*)(.min|.slim|.slim.min)?.js
js-(before|after)
(?:/wp-content/|/wp-includes/)(.*)
Now my score is 93 on mobile and 100 on desktop 😊 that’s so cool