RectalHavoc reported to me that the mobs in the pirate 2nd Job advance map were not dropping the Potent Power Crystals. I stayed to watch and can confirm that all they dropped was candles and cake pieces.
Some notes: 1. Potent Power Crystals are supposed to drop at a 100% rate.(only mentioning this because their counterpart, the dark marbles, for the other classes are not supposed to drop 100%). 2. After the job advance, the crystals are NOT removed from the user's inventory automatically.
