Yes, Lina and Gourry eventually group up with Mirgazia/Milgazia(Golden Dragon from Next) and this elf girl with the finished armor and proceed to mess up some mazoku plans.
Besides the Sealed ability the armor offers, it also has some other tricks like;
The last of the Zenafa-affecting spells. The wearer takes a part of the armor and swings it like a sword, causing a shockwave of light to go through space and burst out from the body of the target. This attack also works on Mazoku.
The wearer of a Zenafa armor concentrates his magical energy into a portion of the armor, creating an extrusion much like a magical sword. The user can both attack the enemy and defend against incoming magical balls or arrows with this sword.
This is another command spell used on the Zenafa armor, which makes it leave its wearer. This can be used to let Zenafa attack a target alongside the wearer's own offensive magic, or to occupy the enemy while the wearer concentrates on a different target.
Now, imagine if the armor got mass produced along with anti-magic tanks and sword of light replicas.