We tried yesterday for about an hour. KS and BS don't drop and the current wiki entry for KCs says they drop in ROZ, WotG and ToAU zones. unsure atm about other COP zones but sea is not part of any 'conquest' type area. That might be it.
Just got my 2 last ones in Grauberg fighting dogies. 1 @ Puddings and 2 from Imps. Took long *** time. Makes you wonder, wth will they have us to do next time, trade in 5 Diorites?
People have short memories, remember Genkai4? All that travelling to beastmen strongholds, alliance fights. Remember Papyrus drop rates? An alliance of 50s needed to kill the liches all lotting on a rare *** drop. Annoying as it has been these Genkais could have been a whole lot worse.