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I find a problem with trying to find a quick guide for a certain hero in your forums.
A quick solution may be to have some sort of forum user application process where they submit the guide and it is reviwed by the forumn moderators. Once accepted, it becomes listed as a 'player guide' on your main champion index. http://www.leagueoflegends.com/champions/index.html
A good example of how this works today is at www.playdota.com You can select the hero on the right drop down and then it will pull up users who have submitted guides and then they are rated.