Only because folks wanna talks to Sue Li *grumble grumble*
I refuse to lose two art votes in a row dangit
I've been pushing the art option since the gallery. Hell, I might have
created it with my Write In, or inspired its appearance! So I feel your pain on that front. XD
But as a first technique, and one that requires quite a bit of mental stretching to be connected to art, I'd rather have something immediately flexible that we can use creatively. Lumos, at least in its basic form, can be replaced by mundane items. Charmed ones, too, more easily than the others.
It doesn't seem so complicated?
Earthly Cloud Sharpening Law is not about materials, its about function. It Pierces, and so is basically the Sword Cultivation analogue, it makes anything stab better, such as the treads of your boots into ice.
Dollmaker's Petrification Diagram Law renders things immobile. Its not clear whether this is about making them more like stone(and thus Earth aspected), or about controlling living things(and thus Life or Mind aspected), but the name is a bit of a clue. If you're looking for a crafting related one, its not bad. 50/50
Humble Light Bringer Law is the most clear one. It creates light. Its Light aspected.
But you forget that there are Arts to include in this system, and a hint at larger categories beyond that. While I doubt that starter techniques such as these can themselves be developed to extreme levels (that differ drastically from their basic original ones), I also doubt that they fall under a single category with no crossover/varying paths whatsoever.
Edit - For example, something from the Sharpening Law could go to the Monsoon Arrow Art (piercing seems more significant for arrows than swords, but the latter work too, which could be relevant since we already use a Claymore), to the Rainbow Chiseling Art, to the Heavenly Surgeon Art or what-have-you. And who knows about the categories above!
Or, putting a different spin on it, it's possible that a Sharpening Law would fall under the Material Manipulation Art with other laws that involve other aspects like shapes, texture, etc.