Other stuff like advertisements? Wikia is the owner of the website and they put a lot of advertissements, I can't do anything about it.
I know there is a lots pictures on some pages. When Javascript will be available again, I will do something about it.
Ok, I need to work a little more on it, but as you can see I drastically reduced the load time on the following page.
http://age-of-empires-castle-siege.wikia.com/wiki/User:Toto89/Sandbox
http://age-of-empires-castle-siege.wikia.com/wiki/Keep
Edit: I have updated the Keep.