You're browsing the GameFAQs Message Boards as a guest. Sign Up for free (or Log In if you already have an account) to be able to post messages, change how messages are displayed, and view media in posts.
They are rare and just an rng thing for ya. Support cards such as boost are best bought max boosted because of this. If you absolutely must farm them then I guess parking in one spot would probably be most efficient but then you lose out on getting any cactuar since if you fight in the same area it's only a single fight with no cactuar at the end. That would allow you to get more fights in though since it would be quicker.
Supposedly an event this month (Choco?) Will have farmable ice sword. Not sure about wind sword.