The wiki is down so I'm working off a screenshot, idk if shit changed since then.
Limited Energy Systems
In order to qualify for a Limited Energy System and do scaling according to it, a character or the system they are using must have explanations or showings that indicate that the powers which should scale to each other draw from the same source of power (or can convert between the different kinds of power) and use up a similar amount of power to each other. Alternatively, it would also suffice to show that the user can invest similar amounts of power into any given technique, should they want to.
For the sake of scaling it would also suffice if powers are shown to use a larger amount of the common power than the technique which produced the feat in question did, although in that case one wouldn't talk about a Limited Energy System as the inverse doesn't hold. (i.e. feats of those techniques that need more power wouldn't scale to the techniques that need notably less)
Broadly speaking, I think these terms are too lenient. When looking for a default standard, I would think we would first want to see what's up with reality or the closest analogue. This is talking about magic, which doesn't exist, so there's not really a version of that there, but what we do have is all sorts of systems of energy transfer, and oh boy does that not match up with this. I really don't like the idea of using energy cost as a method of scaling if we're going to make the real life comparison, because that just eliminates the entire idea of different usages of energy having different amounts of efficiency, which is just ridiculous. There's the obvious things, like how it'll take a lot less energy to kill a person using electricity than it will with something like blunt force because electricity can interfere with nerves easily, or how it may be easier to destroy an object with heat than force if it has a low specific heat or much harder if the specific heat is higher, or so on. Tiering a character based on how much energy they use up to do something is rather misleading, because that isn't necessarily the quantity that actually impacts the world. If I'm a terrible electrician and I make a very inefficient circuit and I hook it up to a reader, that reader isn't going to give the "tier" of what I put into it, because a lot more things than that impact output. If we're going to try and equate something to reality, we shouldn't make the default assumption that a difference in efficiency of radically different processes cannot be in effect, because that would be denying reality itself.
Of course, maybe you don't agree with the idea of trying to get some sort of "closest to reality" sort of standard for a baseline, in which case I'd say that I'm not even really sure that this holds true over media. Now, full disclosure, I don't really care about anime. It's entirely possible that this sort of perfect equivalence is super common in anime and I just don't know about it. Feel free to bring it up, I'm just admitting a blind spot here. As far as I'm aware, the places you most commonly see these explicit resource costs in are games, both of the tabletop and video variety, and I don't think this idea of everything having the same efficiency really exists.
From a gameplay perspective, I'd say it ends up going against what seem to be widespread game design philosophies. Avoiding straight upgrades often seems to be a priority in game design, which seems to result in high cost stuff often being less efficient in terms of a cost to damage ratio, or higher cost stuff having that higher cost due to effects which are more esoteric. It's also a way to make upgrades more exciting than just bigger number, and keep difficulty throughout the game by not just having options that are objectively superior to others. I can't really think of anything where the only variation you have in a system like this is just straight power, and especially not one that has some sort of linear scaling between input and output. Games tend to add complexity as things move forwards, and that is not something that one does just by adding a few zeroes at the end of every number all the way through. Furthermore, efficiency itself is often of consideration for these sorts of things, and that doesn't really work if everything with the same input must have a similar output. This idea of just pretending that different applications of energy cannot be of different efficiency levels and that this is apparently widespread in media is a rather far out one, especially when the page isn't even really going to elaborate on how this is supposedly common enough to be elevated to a standard similar to the restrictions on calculations that would work with real life physics but don't work because fiction is inconsistent.
TL;DR
I don't like the idea of allowing for this just by assuming that similar input necessarily results in similar output, as it's something that's flat out untrue in real life and does not appear to be true on a widespread enough level as far as media goes.
Non-physical Energy Systems
In order to qualify for a Non-physical Energy System and do scaling according to it, a character or the system they are using needs to fulfill all criteria for a Limited Energy System, but for all techniques. Additionally, they have to demonstrate or have reliable statements that all their supernatural or otherwise non-physical powers scale to each other in
Attack Potency. Hence an increase in power / energy should correspond to a proportional increase in the potency of their powers and abilities.
That means in particular that either the user makes use of only one system of power (e.g. magic powered by mana) or that the user uses several different ones (e.g. magic and chi) but they draw from the same underlying power source or can convert their power between the different kinds of power sources.
We've gone over how I dislike the limited criteria, so no point in retreading that.
This bit about needing to prove that things scale to one another is weird to include. It's something I agree with, but it's also something that I feel works a lot better as an argument against this sort of thing. If you've already got proof that someone's weird stuff scales to their punching power or whatever, then I'm not sure exactly what sort of purpose it serves to try and invent some explanation outside the work itself. It's also weird because this sort of proof wasn't required on the previous level, so what about this one in particular suddenly necessitates the elevated standard?
The second sentence doesn't really seem all that related to the first part, to be honest. I'm not sure how simply using a similar power source would immediately serve as proof of very different things being of comparable levels, especially when the whole point of having a source is that it's a repository that you'll take what you need from as opposed to just dumping the whole thing at once. Even if we are to assume that they just share the criteria from the limited energy systems and that the Wokbros got too cocky, it doesn't even seem to meet them. This just mentions needing to have the same highest order source and not even needing similar amounts of input. It seems inconsistent with itself. You get the same problem as the first one did too with the whole "not every use of a similar source is the same" but I'm not going to go through that again.
TL;DR
Mostly similar issues to Limited Energy Systems, seems a little redundant with the whole "in order to be proven to scale, you must have proof you scale," doesn't even really outline what this proof should look like which is the only real point I could see to something like that, also seems inconsistent with itself, site precedent, and reality on how power sources work.
Universal Energy Systems
Universal Energy Systems
In order to qualify for a Universal Energy System and do scaling according to it, a character or the system they are using needs to fulfill all criteria for a Non-physical Energy System. Additionally, they have to demonstrate that they can channel their power through their own bodies in a way that quantifiably enhances them or otherwise allows scaling of their supernatural powers through their physicals. Hence there should be evidence that an increase in power / energy should correspond to a proportional increase in the potency of their physical statistics. In the rare case that it is relevant for scaling the reverse should also be demonstrated: That a feat of non-empowered physical strength applies to the amount of supernatural power.
Visual evidence of amplification is not considered necessary.
If the power source or universal energy system should be removed from a user by some means that should result in a notable loss in physical strength or alternatively even in physical harm or death. That doesn't necessarily mean that they should be reduced to the level of regular humans, though. Note that removal of energy sources can also have detrimental effects if they are not universal and as such negative effects of removal do not necessarily imply universalness.
It should be noted that systems don't need to be continously active. Some systems might only enhance statistics while the character physically channels energy though their body, while other systems do so passively as long as energy is available.
Yada yada didn't like the first two and don't like that bit by default
As far as the first paragraph goes, this really is just problems I've already talked about. Why does having the same source necessarily mean that they're just as strong when this doesn't seem to follow in either reality or fiction, why bother saying "in order to be proven, you need proof" without elaborating on what such proof should be, why throw in a random line about how visual evidence is not the only evidence, yeah yeah it's similar reasoning to before. If someone was to dispute this one but not the others I'd be fine to elaborate, but we're already kind of overtime.
Parts 3 and 4 is stuff that I personally think is too verse specific to really say like that specifically on the power page, but it's not a big deal. Not tldr-ing this section it wasn't very long.
To summarize the overall points, I don't think that these standards match up with either the real world or fictional trends on a widespread enough scale that they should be assumed to be the default rather than just proven on an individual level. I believe this attempt at standardizing something incredibly nonstandard and universe specific is ultimately fruitless at best, and misleading at worst. I think what would be much more useful would be just outlining what sort of things can serve as proof of scaling rather than trying to force everything into some specific system, and to also not assume that there is never any variance in efficiency and that input is the literal only factor determining output.
Edit: Received some criticism, may as well put it on this thing. The argument about differing forms of efficiency from input to output works better when it's the same basic method of energy transfer, so here are some examples. A lot of things are hard but brittle, with a prominent example being diamonds. You can't really scratch them with anything naturally occurring, which makes them heavily resistant to that sort of application of force, and diamonds preform well under consistent pressure, being formed from incredibly high pressures to begin with, but they'll preform poorly against sudden impacts. Hardness and brittleness are very different characteristics of an object, despite both of them being measurements of how well an object can stand up to force. Applying the same amount of force trying to cut a diamond and trying to hammer it wouldn't produce the same results. Another example of this is with electrical appliances, an example suggested to me being that of light bulbs of varying efficiency. Some bulbs are wasteful and convert a lot of energy to heat in the process of creating light, and as such don't shine all that brightly compared to a more efficient bulb. The heat being produced by the bulb still exists, but it's not very useful to anything, meaning that in terms of useful output, you can end up with differing results despite the same input. I feel like it would be pretty misleading to call something 8-B for example when in reality it takes 10 tons of tnt equivalent energy to preform and has a useful output of only 5 tons and then 5 is wasted.
(Also, a 50% inefficiency like that may seem large but that's actually really good in the real world. Most power plants would kill to be bumped up to 50% efficient and sit more in the 30-40 range.)