hi, thank you for your feedback, I am happy that you could find something that you liked :)

- re: I’m not sure what the potency of a Scroll means

I liked the idea of some mean to measure the effectiveness/strength of the knowledge contained into a Scroll without tying it only to a specific aspect. 

In my games, I have used the potency, for example, to measure how many people i could declare were banished from the land before someone would raise suspicion about the legitimateness of my scroll.

In other instances, I used it as a way to understand how much of a blunt hit i could absorb (weapon dmg - scroll potency).

I did not have one specific use case in mind for potency, but the table is there to give me a mean of measure impact against whatever situation i am trying to use the scroll in!