I'm stuck in the Third Ascent of the Pharos, in the place with all the coloured sigils. I've been through it once before but I can't for the life of me remember how to do it. I keep using the wrong sigils and getting sent to the room with all the undead enemies which slaughter me. Now before you all say to check gamefaqs or whatever, I already have and all the walkthroughs differ on which sigils to use. So my question is, what's the correct order to use them in?