That might work better as a full design I think. We don't even have a plate cuirass to work off of. Also, it wouldn't be demi-artificing. No, we do that when we want to go big and don't want to be tied down to the rules as much. Remember that Artifacts, whether Demi or True, are unique creations.
Anyhow, my suggestion:
Talisman of Wind
This piece of jewelry is not a simple statement of fashion or wealth; no, it is a symbol of Loji Mastery and the pursuit of such. Inscribed upon this item are the Runes for Empowering ones Voice; their control of Shape(Air), to the point where directing all the winds within their local area becomes not just a sign of Herculean Mastery and effort, but an achievable goal within the grasp of the studious.
Of course, such a magical focus is found primarily among those who have devoted themselves towards mastery of one's Voice; the Voiceguard.
(TL;DR: Give the Voiceguard a Moderate Strength Empowered Shape(Air) Rune item)
Blue Jade Rainmaker
A specialized tool made to bring forth to mind the sounds of rain, this item can be used in tune with chants, with skilled users able to keep the rain to the cadence of the chant itself. Not only does it sound peaceful, it's swiftness-granting effects grant deftness to help with using it. and in tune with our Voiceguard, the effects will last longer, and the burden reduced.
Made of wood, Blue Jade Dust and more regular beads, once capped the resultant Rainmaker is then inscribed with a Medium Shape(Air) Empowered Rune, and painted to the style of the user.(Who at the moment, will always be the Voiceguard themselves)
No doubt expensive too normal people, but the Voiceguard is rare enough they can make use of this piece of equipment.
Cost Prediction: 2 Land+1 Mana+4 Mana.
Mana of 2 is a cost deficient of 3, with attack Meaning upgrade bringing it down 1 Mana to Expensive if we go that route. As is, the Voiceguard are VE, and so equipment like this will see use. Alternatively, take the Jungle.
It taking 2 mana rather than 1 is still within VE range though Stick to the beat of your chant, and victory is assured. Let the rain fall slowly and/or swiftly.
Needless to say, we also have more a more normal variant without the Empowered Rune, for normal people's use like our Blacksmiths and Refiners in day to day work. Bit self evident, though we'd need a Refinery design to take advantage of this. Unless Tallion throws it to us as a bonus, meaning they can make more without getting as tired.
BJD, cost 1. Shape(Air) empowerment for Mana Battery, cost 1. Shape(Air) Medium Empowerment inscription, cost 3? Total, 5. Cost deficient of 3, or potential 4?
Literally All the Air Magic RainmakerBJD, check. Empowered Shape(Air) rune in the Refinement, check. Rainmaker ready to store the Mana Battery BJD, check. Inscription on the finished Rainmaker of Medium Empowerment Shape(Air), check. Painted a blue jade color, check.
This Rainmaker is all of our techniques put into a single item for Voiceguard use to start. It is hoped it will serve an instrument for them to use, but even without that advancement, it still grants swiftness, a mana battery, and the ability to cover the field with a Medium Empowered Chant on command. Our Hellbringers are going to be happy with this, and it will reduce the difficulty for our Windbringers. The pure expression of Air Magic, most particularly the battery, will also help those who don't need the Shape(Air) empowerment as well.
This piece of equipment will be very useful in the Summer to come, and in the future when we take to the skies on Wings of Wind and Blue Jade. Though the latter part is a ways off still.
Despite the Name, we do not use the Wind Chant for Elemental Material. That would be silly and a bit pointless? Though making a single prototype that does would be interesting if we have the time, the traits aren't needed when the BJD is already an Air Magic material.
More writing.
Painters of the Loji WorkshopsA specialized addition to our workshops, this will fall under an infrastructure project. Put simply, painters. The makings of brush and paint to adorn our armor and vehicles. Though to be honest, this is just where the Painters for the Loji will do their work.
The first part are the Holy Refineries, which produce their own holy material. In this case, dust, Blue Jade Dust to be specific. From here, it is mixed to create paints, and then applied to our stuff. A chanter/painter sect dedicated to the mixture and creation of paints both mundane and magical. This will effectively increase our overall ability to mix paint colors, but the main draw is that using the dust for the paints means we can apply the BJD to items.
To start, we have four painters to access. The first is the standard Blue Jade Painters. They mostly apply the basic Blue Jade Paint to Sailcarts, and some armors, and are the lowest tier, not yet skilled enough in applying Holier Paints.
The second is the Speed Blue Jade Painters. They mix and apply Blue Jade Dust that has been enhanced with the power of the Wind chant, the aspect of Speed. They carefully apply their brushes to the Sailcarts, and use streaming lines to create an image of art. This obviously makes the carts very quick. They don't usually apply it to anything else though due to the current dangers of being too fast for humans.
Third, Separation Blue Jade Painters. their job is to paint armor and weapons of the Stillborn variety. Given the number of scales in a full armor set, this is one reason why being close to the Windforges is a good thing, as they can apply the paint before the armor is given out, and repaint it when it gets damaged in the heat of combat or after repairs. They also paint shields, which is a much easier job
Forth is the Flight Blue Jade Painters. However, they currently don't have a job other than helping others in painting lighting lines on the heavy pieces to make them easier to lift and swing around. Though this in itself can be applied to weapons, and done properly, they have their full weight behind the swing while being easy to maneuver around.
It can't really be denied that the Painters of the Loji are a vital part of Loji Power, for all they don't fight directly. And thanks to having an area to themselves, they can focus on mixing paints with the Holy Materials. There is one additional part to their jobs, making the paint waterproof and heat resistant, as well as making paint remover for when an idiot screws up or something needs reforging.
[tl:dr] They are a new infrastructure, and their job is quite literally Paint. As such, they mix Holy Dust into paint, and then paint the Loji's gear with their brushes. A Holy Sect when the images painted often depict martial prowess and stories. Additional Dust types would need to be folded in, but this allows us to deploy BJD painted items to the battlefield, within reason. Anything too complicated that needs multiple would require a full design itself.
For levels, each level of development grants you the ability to deploy Refined Holy Material Paints of 1, 2, or 3 cost, and so on As the cost happens to be linked to amount needed... Effectively, cost reductions for stuff that uses it. Needless to say, this also includes Land cost for the paints, having a dedicated area.
Ah. For carts, they get Speed Paint, and the regular stuff for the ones that can't be painted with it, if any.
Stillborn Armor and Weapons get Separation Paint, with some Flight Paint as well on officer's gear. Shields also get a simple coat of it.
Flight Paint has no use at the moment other than some minor lightening of weapons and some officer armor. It will be the Paint of Choice when making anything that flies though.
The basic painters get drudge work, like making paints and paint remover, as well as painting the stuff that can't afford the extra 1 cost from the Wind chant. And Ballista for swiftness of adjustment.
Even Shorter Summary. Applying the new dust to equipment via paints using it.
Armor Improvement: Stillborne Full-Plate Armor(Plus Blue Jade Dust/Flight)(1): naturegirl1999
Blue Jade Dust: ()
Talisman of Wind
Literally All the Air Magic Rainmaker: (1) TricMagic
Painters of the Loji Workshops: (1) TricMagic
I'll note I'm pretty sure painting is heading into demi-territory again, only for Water this time. But hey, it gets applied, and best to learn if it works now rather that later.
Rainmaker is adding everything we have so far on Air into a Percussion instrument, and relying on the "It's Air Magic" explanation for a new equipment. Will likely be hard as it's a revision, but on the other hand, none of the stuff on it's own is difficult. Blue Jade Dust turned into a Mana Battery, put in the rainmaker and sealed. Then the Shape(Air) Medium Power Rune is inscribed on the rainmaker. That's it. Hopefully, this makes an instrument we can use too, but all the other functions are useful still for Windbringers and Hellbringers.