The hint is possibly more vague than it probably should have been on the Raven-Man card.
Don't resolve either of the scripts written on the card - add them together and resolve s.569
If you get card F (by spending 6 story tokens) you can see the full text at the bottom of his card telling you to: "Try to connect both these paths. Do you guess how?" whereas if you get card G (by only spending 3 story tokens), the words at the bottom are obscured and you don't get that hint.
Okay i was on the other hand thinking way to far for this. using the method of how to combining the numbers of the floors to get the stories. because the 2 stories option where above each other. and always the number going first apers left side of the card. So I was thinking using the left number of the lower script and the right number of the upper scrip. to get to 54 but felt a bit defeated after feelign clever to think about it that way. In a way i find my solution to a puzzel more clever since you must use the gimmick of the dream to solve this last puzzle instead of adding a total new way of solving problems. one that get not used and even ill advised during gameplay.