Talk:Wolf of Scarlet Woods Revisited/@comment-26026092-20150201180926/@comment-1465604-20150201182731

3*. 10% keys cannot drop in the 2-star and even though they're rare, each 10% key is worth 9 1% keys. Also, the 3-star has a higher chest rate than the 2-star. Generally speaking, the 3-star seems to have the exact same chest rate as the 4-star and 5-star for some inexplicable reason. The 5-star has a tiny chance of dropping 25% keys, but that's it.

All-in-all, the most MP-efficient quest to farm seems to be the 3-star quest. Keep in mind that I'm farming it using chest-boosters, who seem to give you 1 extra chest per run no matter how many you run (I farm the 3-star using Mari, Vivi and Katze).