depends on how many -jas and spellblades u already have of that element i think.. because some battles have strats that require u bringing multiple characters to down it with weakness. if you don't have a good ja replacement with enough charages.. you will end up losing damage instead. then again if you regularly run with some form of +mag or something you might be hitting 9999 on weakness with -ga, in which case, dont do it.
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