I have FA icon and it's not beautiful. the icons are almost invisible
Can you give the forum url ?
You have in your global.css :
.forum_off i{opacity:.4} and .subforum_minioff{opacity:.4}
Change these values to a greater one (the max is 1). Or/and change their color (.forum_off,.forum_offclose,.forum_offlink{color:#333;opacity:.5}).
Well, I've a look at the content of your forum, I won't help you anymore because you're breaking 2 rules: No illegal stuff - No hacking, warez