Here’s a useful article and video walk through that I plan to use to beat this instance. Credits to Kes for finding the video walk through.
Video walk through (only covers East room i.e. pistons): https://www.youtube.com/watch?v=C_oKNsJwlUU#t=457
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You’ll need to flash or Chrome to see the in-line video above.
A more detailed walk through: source: http://oathkeepers.shivtr.com/forum_threads/280905