My DnD character is a sorta artificer/warlock mix who has technical prowess and has a patron that can give him glimpses into technology from alternate universes (basically advanced knowledge on technology) and their ultimate goal is to make it possible for the average person to have the power to counter magic, without having to have magic powers themselves.
They also have the goal of starting a company to exploit this technological advantage to raise a professional army to counter other armies who use wizards and other magic users in combat. The problem I run into is the sheer strength that magic can bring to an army. Everything from being able to call down meteors to even just the ability to put people to sleep would make an army not using magic practically useless. So I am trying to find ways to counter magic on a military scale. I am not completely adverse to using a little bit of magic to reach this goal, but I would like to keep to the original premise that the army is made up mostly of non-magic soldiers.
For some context the setting of the game is based off of a Europa Universalis mod called Anbennar, so when I say technologically advanced I mean so in a late medieval/early renaissance sense with a fantasy twist (think breech loading guns that use crossbow arms instead of springs, gatling gun type weapons, fantasy “tanks” which are either pulled internally by horses or use large cranks to rotate the wheels, pedal powered planes, stuff Leonardo Da Vinci would come up with). I hope to have at least basic steam engines decently soon, and to begin building factories for mass production. I think the current technology level would be around the 1870’s or so in terms of weapons available, though none are as refined as they had in our real world by then.
I do have access to a specific metal called “Damstere” which is made of crystalized magic and in essence acts as a spell slot. It can be burned to power magic that is connected to it in some way (be it scroll of some other form of magical infusion) which I considered as an option when combined with scrolls of antimagic to make a sort of “anti-magic shield grenade” but the sheer time cost to make a single anti magic scroll is very high, and getting access to enough 15th level wizards to make the scrolls would be nearly impossible for large scale production.
Another option later on is a material known as “Dark Damstere” which has inherent anti magic properties, but just getting access to that material will take quite a bit of time (nearly a century), way too long for it to be a viable solution in the short term.
So, with the information provided I ask, how could I go about having armies which can have at least some resilience against magic?