Personally I think you "under-marketed" the wooden boards a bit, RAM. Their name is misleading and the description is somewhat vague - I thought they were actual wooden boards for a while before carefully looking at them again.
Also, Roboson, out of curiosity, do you prefer the Hopeless or Heretic shells? Hopeless would need a bit of refinement to make it a bit more anti-divination versus anti-prayer (same principle though) but it still works. I'm asking because isn't the Heretic shell pretty functionally similar to the Hopeless?
Anyways, a FUTURE design based off of RAM's living crystal ideas.
Future Design: AS-DF1 "Gallant" Crystal Barrier
Fortifications are generally a good thing to have.
Fortifications generally take a while to construct.
Our mathemagicians, being the genius Arstotzkans that they are, have come up with a solution to this problem: The living crystal. In the past, a more eccentric lead Mathemagician suggested the use of using the "spark of life" imbued to the fire wasps our mages summon in combination with crystal could lead to interesting results. Now, as our mages have observed in the field, our fire wasps aren't exactly smart. This leads to problems, but we must start somewhere.
The AS-Deployable Barrier 1 "Gallant" uses this living crystal in its core design. Ultimately, the intention of the design is to be distributed to as many mundane and magical troops as possible.
Prior to activation and in its "default" form, the AS-DF1 takes the form of a small crystal "stone" - almost like a gemstone - stored in a very simple case on the person. In order to activate it, an Arstotzkan soldier merely has to take it out of its case, apply pressure, and place it where the barrier is desired. Once this is done, the crystal stone rapidly grows out into the shape of a large barricade - big enough to completely shield a huddled group of roughly 3-5 people (depending on how huddled they are) and/or an HCx. This is accomplished via the use of stored energy in the crystal imbued at its creation; enough pressure triggers a chain-reaction, unleashing the energy. Normally this would result in a magical explosion (multiple people were lost during testing), but the "spark of life" imbued in the crystal guides the energy into growing the crystal into the shape of a useable barrier. Because of how fast this chain-reaction is, the crystal expands with speed comparable to a bomb, and is thus very useful in the field.
The crystal, once deployed, has the same maintenance requires as regular crystal. Allowing it to be used as temporary fortifications mid-battle or for easy construction of more long-term constructions with an apprentice or other mage present to maintain it. The recommended use for soldiers is for protection during artillery and other ranged fire, general-use barricades, or for shielding artillery. It also has application in the sea - for shielding against hostile bombardment. Our mathemagicians theorize it could be used in the field to patch-up holes in our ships, but they're uncertain if that can make it in the final design. If not, a simple revision to the imbued life can allow it to intelligently patch up holes it's placed in.
Now, this is an incredibly simple application of the "spark of life" - it just uses it to grow, but with this pioneering design completed, we could explore much further possibilities in imbued life!
If we do use this design and do it after something like the AS-HC3, then we can take advantage of the fact that we would have already explored into "stored energy". Not exclusive to the AS-HC3 design of course, but anything that uses stored magical energy.
Also, note to self, this could be revised to work even better at sea - with minor improvements to the life imbued, the crystal could instead grow in holes of ships to patch the hole.
EDIT: P.S. more votes from undecided people in general would be nice, by the way. I think the heretic shell, anti-magic shell, and any of the new artillery (HA1 is the best though clearly) are all viable options.