BuddyPress.org

Hi all, I have a website called Educa.net. It has a lot of courses with the possibility of buy and do them online. The, I bought a theme called wplms which works with BuddyPress. This theme is perfect for learning websites, and I like it.
But I have a big problem which is about the speed of the site. It load very very slow each page, I check it in gtmetrix and the results are ridicolous, about 8 seconds! This is totally inadmissible as you will understand.
So, I wrote this in the official forum of the theme: http://vibethemes.com/forums/forum/wordpress-html-css/wordpress-themes/wplms/33828-about-the-load-speed-of-wplms
If you see that thread, the author of the theme says literally: “The issue in general is with all BuddyPress themes”. So I come here in order to look for a solution! Because they didn’t give me any.
I’m enduring this issue thanks to the plugin Quick Cache Pro, which I bought, and use it to cache all pages NOT LOGGED, that is, if one user is logged, the pages are not cached, but if yes, pages are not cached and my problem with speeds comes….
I need solve this issue, and obtain lower load times.
I’ve made these points by the moment:

1 – As I have woocommerce plugin, I read that it can ralentize the load time, due to scripts and styles ARE LOADED IN ALL PAGES: http://wordimpress.com/how-to-load-woocommerce-scripts-and-styles-only-in-shop/ I solved it.
2 – I minimized scripts and styles. (but not all files). I only minimized scripts and styles throught an option in the settings of the theme. If I do it by myself, I can broke anything.

3 – As I mentioned above, I installed Quick Cache Pro, which is helping me a lot!