Understanding card values

[Lithic Owl]

Loving this game, totally hooked. Likely will be the reason my wife divorces me.


Anyway, I'm making assumptions as to the ranking of the values for the various stats on each card, as I have not been able to locate an explanation for them (perhaps I have not looked hard enough!)

I assume the values are ranked like so (arranged from lowest to highest):
F D C B A S SS SSS

(keep in mind i only have three card types so far, so i am making assumptions on potential values I have not encountered yet, based on previous experience with other alphabetical ranking systems)

What are the disparities between values? For example, how many times "better" is A than B?

I am also asumming that the letter in the scroll to the top left of each card denotes the relative rarity of the card. So a C would denote Common.

Please comment and correct or validate my assumptions, and if at all possible, provide any links that may assist my self and other novices in decoding the data on these cards. This is my first forray into the trading card world, so please forgive my ignorance.

Thank you for your time and assistance.

~L.O.

[The Cunning Condor]

If you are reading this, you must love exploring.