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Honestly, you've SBed almost everything in the game. That's MUCH harder than Shin'en.
Grindy is different of HARD. But yeah Shinnen is way easier than i though it was going to be ^_^. Its way less annoying than Ella^
I know, but grindy requires months and months and MONTHS of hard work. With the right units, everything in this game can be done in less than that. ;)
Also, I never tried for Ella^ because I'm not a hard worker