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HOLY CRAP.
Anyhow, I know you put a lot of work into it, but it doesn't really make sense. Just simplify it:
Hammer and Sword Fionas will almost identical W.ATK. Maybe a 200 difference.
Then, percentages matter, and the hammer percentages are HUGE. Maybe I'm just not understanding what your post is saying, but I get the impression you're saying that Swords will deal more damage most of the time, but the numbers I'm seeing in this guide tell me otherwise.
Three Blossom Blows add up to do .20
A Stigma level 0 does .24
that's 20% more damage o_o
Maybe we should talk about this ingame, I really don't get it :(