Just playthrough normally three times, by the time you do so you'll be skilled enough w/o Judas' badass secret/hidden Ougi (assuming your trying to get it eventually)
Plus you never know how much grade someone else's file got (unless they beat the game and told you), so you'd be better off w/o it.
However, I have a save for the 1st playthrough though on my MC (I assume you want the completed file w/o grade/inheritance already specified
) , if you really need it, but keep in mind you can get most of those extras (even Judas' unlockable Ougi) on just a 2nd playthrough for the PSP version so I've heard (no patch for it of course, but it has it's advantages
)
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