After reading this thread, I'd like to locate a fic I read a LONG time ago.
In the story, Ami is found by Luna first, and she has to fight a few youma alone. Ami only has Shabon Spray/Mercury Bubbles Blast, which really isn't useful as an offensive move, so has to get creative. I know she improvises weapons and uses the terrain. I think she also studies martial arts or a knife, I can't recall. I just recall her being creative in finding ways to fight given a lack of offensive magic.
Does anybody remember that fic? It's driving me nuts as nothing stands out in my bookmark file. It might have been in the RAAC archive instead.