The moogle by the gate, Encounters and Treason sells KP gamblers and multichains and there are plenty of KP bonuses in the vicinity in the 000 story mode. Grap one of each, the multichain, the KP gambler, and a KP bonus and enter Encounters and Treason with 2 strong level 60 (at least) characters and go to the middle and use the KP gambler, then the multichain (make sure you have it set on Round Robin) and after you have acquired a 21X7= 147 KP use the the KP bonus and receive 294 KP!! I just did it like 3 times in a row and it was amazing. Haven't seen a place where you can get more so far.