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By just saying, "anyone know a good assassin build?" doesn't help us much. You forget that each play style revolves arround different builds, do you want it for farming? Do you want it for AB? Do you want it for RA? Do you want it for general PVE?
Unless you give us any guidance on what you want it for, pvx.wikia.com is really the only guidance I can give you.
You also need to say what elite skills you have capped because that way we can help guide you in the right direction as some elite assassin skills only become available late in game.
i think you should read a assasin guide http://www.guildwarsguru.com/forum/basic-guide-playing-assassins-t10288967.html this will help you getting started, try to make your own build, something that feels rigth.some times you might have to change your build acording with the foes your going to figth, just remember your a dps not a tank, unless your going perma shadow form