I use Swift Lite plugin for cache and their "plugin organizer" for deactivating plugins on a page-by-page base. This improves dramatically the num bers of server call in heavy pages.
A3 Lazy Load for avoiding loading iframes right away.
Further I changed the image size in the Explorer page. In the child theme I changed the image called in these 2 functions: listing-preview.php e listing-quick-view.php from 'large' to 'woocommerce-single' . This means that instead of retrieving the large image for all listings in the explorer page it retrieves a more "appropriate" size, namely the woocommerce-single (max 600px wide).