Now, how far can skill take you? Power vs. Skill, which would be superior? Or does it all depend on how big the difference in numbers is?
Since WW seem heavy on the idea of Berni not being only extremely powerful, but also inhumanly skilled, it's probably a blend of both, skill and power is necessary to truly stand at the top of the food chain.
That or being a damn freak blessed with an extremely rare condition and the vessel of a dormant God, like our depressed Clown with reality warping
Power>Skill unless the Power difference isn't big enough. It's kinda like, "Who would win in a MMA fight, the most skilled flyweight vs a Cole tier heavyweight?"
The answer is Heavyweight. I don't care if the flyweight is Mighty Fucking Mouse. They are being snuffed out. You switch out the word "flyweight" to "bantamweight" chances of success for the weaker opponent increases, and so on for smaller weight class difference.
At a certain lack of power difference, Skill becomes much more important. A much more skilled Light Heavyweight would beat the shit out of bum Heavyweight. A Middleweight of the same skill would still win, but not as easily. A welterweight, maybe. Lightweight, hell no. If BJ Penn couldn't do it, it probably can't be done.
Now, determining how Weird World calculates thiss accurately in his story world would improbable without his input,
What should a agent in the world of Superhuman seek to improve as a Superhuman?
Depends on one's goals and circumstances. Sometimes, skill is better. Sometimes, power. But there's seems to be a limit on how powerful one can become while remaining "uncorrupted". If you have a problem with being corrupted, you should focus on skill, typically, but not always. Essentially, go for Power when there's lack of corruption and the math makes sense. What do I mean about the math making sense?
I'll explain.
I personally go for the superior percentage increases in game.
For example
Let's say there's a reward of 50 Power and 10 Skill. 50 Power sounds better without knowing current stats but let's say that your current stats is 500 Power and 30 Skill. 50 Power would be an increase of power by 10% and 10 Skill would be an increase of skill by 33.33% percent.
In that case, I'm going for the Skill boost.
It is like BenoTF25 suggested you need both. Crossfit train both of them as much as possible. Don't be a Cole.