I (almost) wholeheartedly agree with this line of thinking. I agree that the principal factor of light is relevance, and I like the way different character relate to it: rose sees what choices will be relevant, vriska steals relevance even after her death, aranea tries to change what is relevant. However, I don’t think you should entirely throw out knowledge and shortcuts as elements of light. All three of them revolve around taking shortcuts: rose destroying her session to find answers, Vriska‘s gamer mentality where she always wants to cheat, Aranea attempting to take control of a doomed timeline. Vriska is also heavily knowledge-based. Sure, she relates to it differently given her class, but she’s always using knowledge. Her maps of the furthest ring, stealing information from Lord English, mindfang’s journal, her magic cue ball stealing from doc scratch’s knowledge; it’s everywhere if you look. Sure, knowledge is an incomplete definition, but as you’ve stated that luck is the same as relevance, is not knowledge also the same? Is knowledge not what enables a light player to find relevance? In my opinion, since a character cannot directly interact with canon (other than John, and even then he interacts with it in a breathy way rather than a lighty one) knowledge is the tool of the light player to influence relevance. (I could see an heir directly affecting relevance, but definitely not a thief, seer, or sylph)