Hello,
Revolution slider released new update https://www.8theme.com/download-plugins/ You can try to update plugin and check if it improves the speed. Also, you may try to optimize images that you use for slider https://tinypng.com/
If you want to place static images for simple pages at the top of the site without breadcrumbs you can disable them at 8theme Layout Options of the page and just use simple image in content. If you want to show image at the breadcrumbs you can upload featured image for your page and it will be displayed as bg for the breadcrums.
Or maybe provide me screenshot for better understanding where the image should be.
Regards