To go down the first set of stairs without falling, you have two options, either go down them backwards, or press / to switch to walking speed.
When you first do the platforms, it is recommended that you stay in ‘walking’ mode (press / to switch between walking and running). If you fall from these platforms on your first attempts you will have to redo the whole puzzle including the traps. Some people may find it easier to use ‘click to move’ (found in settings>interface>misc) but the accuracy of this may be temperamental, especially when going round corners. As a rogue with the riftstalker flashback ability, I often drop a memory capture point every so often, so if I fall I can quickly flashback to that spot again.
Upon arriving at each platform, you must go to each dice and change the number first, then go back to the correct lever and pull it to open the portal to the next platform.
On platform 2, change all the dice first, then pull the lever to platform 4, then pull the lever to platform 3, the portal for platform 3 should be right next to you, once on platform 3, change the dice, then drop back down to platform 2, you should then be near the platform 4 portal, which you already activated 🙂
All the other platforms just have one specific lever to open one specific portal. There are other ‘dud’ levers, don’t bother with them.
Here I have made a map to show you the correct lever to pull on each platform. When you have changed the dice and then clicked the lever one of the dice platforms will have a pulsing blue bubble, go to that bubble and stand in it to be teleported to the next platform.