Get all four crystals to vibrate at once on Spire: The Spider Chair
This is a very tough puzzle. It, like the Mangree puzzle in Haven, is set up with a clock ticking. After figuring out which combination on the three cables makes each crystal begin its vibration time it is a matter of time. When you know those, watch every crystal carefully and see how long it takes for its vibrations to stop. Four codes, four crystals, and three cables with twelve markings apiece on them. Start the longest-vibrating crystal first. This will give you about 45 seconds to set off the others. Longest to shortest is the key. The main problem is keeping track of where to set the sliders on the markers without making a mistake. You can try marking the screen with something that will erase easily to keep track.