This is a Day 10 to 12 Hard Mode score attack for the last Miniflan. Waiting until late in the game to beat last ones and fighting in chaos infusions will significantly increase gil received after battle. I'm only on my second playthrough, so I am not fighting with optimized stats, abilities, or equipment.
Like with most small scale last ones, we recommend fighting Miniflan before Day 13 so that the chaos infusions are saved for more lucrative encounters. See this topic for an discussion of when to defeat each last one: http://etrosgate.com/forums/viewtopic.php?f=9&t=234
Lightning Returns: Final Fantasy XIII Statistics For Etro's Gate
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