http://studwww.ugent.be/~kvloeber/BD/A4/Concentration.htmlMadelin, look at Desdemona's map, please. She explained which lever opens which door. These are the numbers 13-17, corresponding to the doors 13'-17'.
I did it like this: I scrolled and clicked on a lever, if my chars ran to it, the way was free. You should be able to see lever 13 and open door 13. Lever 14 is the one farest away, there I scrolled. And from then on I saw all levers at one glance and simply sent one char to it, by clicking on the lever.