The fact that you're using numbers to define power levels feels... very JRPG-esque.
If this is just a standard fantasy setting, these percentages aren't going to be mentioned in-story at all, right? Unless there's, say, a laboratory that arbitrarily defines power levels with a tangible concept? It's pretty unrealistic to expect everyone to be proficient with a given element at perfect increments of twenty. Oh, and...
Would you mind explaining this line?
"Jack, you have debauched my sloth."
![[up]](https://static.tvtropes.org/pmwiki/pub/smiles/arrow_up.png "[up]"){kind=icon}
The RPS relationships I described in the Type K and O sections usually only flow in one way, if the power levels are the same.
Say someone employing Water Genesis is attacked by someone employing Fire Latency. The Fire user will win out because he is more powerful, even though Water would normally beat Fire.
Oh, and the numbers are never mentioned in-story. They are just for my reference.(I probably shouldn't have mentioned them... ^_^")
In a story I'm writing, I have 6 elements (Fire, Water, Wind, Earth, Thunder(electricity) and Ice)that have different relations between each element. I hope this isn't too confusing once I list it out.
Rock Paper Scissors
Type K: includes Fire, Water and Thunder. Fire beats Thunder Thunder beats Water Water beats Fire
Type O: includes Earth, Ice, and Wind. Ice beats Earth Earth beats Wind Wind beats Ice
Cardinals- The two elements either cancel out(due to the users having the same power level) or one overrides the other(due to difference in power). Thunder and Earth Fire and Wind Water and Ice
Of course, with Type K and O, the natural eclipsing is overcome by the losing element being more powerful.
Power Levels
There are 5 levels of power(or how infused the element is: Genesis, Latency, Potential, Breakthrough, and Prime.
Base 100% Genesis 120% Latency 140% Potential 160% Breakthough 180% Prime 200%
Each character can employ all of the elements, but to keep things even, they also have a "Lead element", or one element that they are more proficient than the other five. They receive a 10% bonus in attack effectivity.