@KoL Agreed. I mostly use numbers as a way to give a vague understanding of the limitations of my characters abilities. There's no actual numbers system in place for how these abilities work In Character.
On the topic of the Supernatural Class Skills, I was just under the assumption that any mysterious powers granted by Classes were a result of the Enlil Network. I did design my characters Classes around their interests and their Tablet Power. I'm assuming that Tablet Powers, in most cases, manifest first in a person. Hence Piper's interest in technology and hacking, since her Tablet Power has let her have influence over machines since a young age. Same with Jayce's Time Magic, since Parallel Convergence is a Time Altering ability.
Speaking of Jayce,
@Redward, I'm going to move him and Piper over but I'd like to make a slight edit to his Rewind ability. It would be as followed;
During Active Flow, Jayce is able to use Lesser Rewind on himself. Lesser Rewind functions the same as the original spell, but it can be used even if Jayce has already used Rewind on himself and is still in his 4 Hour Cooldown Period. This variation does not restore Jayce to a prior state and only functions as a re-positional ability. Using Lesser Rewind removes Active Flow.