"Once we've got a dearth of people in immediate danger of death or permanent uselessness, we'll work on scar-removal, but your torso's current state pretty much just toughens the skin and makes you feel less pain in the area. Well, it will once the pain from the injury itself goes away."
{You could totally enchant more things with the same stuff. I'm going to say that it's the level of energy put into the enchantment to begin with that dictates how much energy the enchantment can use, so placing this strength of enchantment on, say, a main water pipe would end up with the same- already fairly small -amount of healing energy, spread across the entire fortress water supply. You could put more energy in, but even doing this one would have severely drained you from a fully-rested state, and should have killed you as you were at the time, had the Author not shown mercy for your ignorance.}
{You could also save a few characters and call them 'Glyphs', which also might prevent the occasional bit of confusion with other varieties of pattern.}
{Edit; Also, it's worth noting that anything enchantment can do, magitek can do with less initial raw-energy input, but more physical complexity. Magitek is more efficient, more complex, and more delicate, enchantment is more durable, more energy intensive, and simpler. They usually work best in collusion, you want that lever to have an enchantment so it's more failure-resistant, but the flow controller should probably be magitek.}