Antinomia: FF6

You can utilize some of the event code if you like, but be warned that it's a bit more expansive than it might look:

Thanks for the offer, but I will probably need to write my own events so that I can fit it into the right spaces in my rom. I'm more looking to use the idea.

It's actually not possible to only have some party members in Magitek armor in the battle screen, it's an all-or-none thing.  I tried to edit Terra's flashback in the beginning of the game to have Terra in armor and Kefka not, because I added an additional follow-up scene after it and Kefka doesn't have a "riding" sprite so his map sprite was getting messed up if I put him in armor there.  But to remove him from the armor necessitated removing both because the "Magitek" status applies party-wide.  So, if you have the two grunt troops in armor, Leo has to be in armor, too.

Huh. I actually didn't know that. The only thing I've done up until now with Magitek is remove it, since the other bug is that you can't have 4 magitek suits onscreen at once due to sprit limitations.