I have have only seen the ninja feet drop after at least 3-4 hrs in abyssea and then it was a pt (which of course i was out lotted all three times >.< ) and i have been back quite a few times soloing on my ninja, and as Renesmey said when i got to where i was starting to get the good stuff i was already down to 15 mins. I am starting to think ninja af3 feet for me is going to be a myth lol.