Missed out on the last one, despite using all my free combativity points as well as c6000 kobans of refills. So obviously quite frustrated, the frustration is doubly so due to only receiving 5.5k cash per boss fight, so not only have I wasted my kobans, i've also missed out on roughly 7m in cash by fighting Ninja Spy rather than my highest other boss.
Then we have the fact that this legendary girl was my class and likely not to return, or at least not for a very long time.
As such i've cancelled my monthly card and will no longer contribute to the development of this game. I will continue to play, but if spending real cash doesn't improve my chances of extra drops, there is no point in spending it.