A couple of questions in case someone's figured them out. I can't tell if they're obfuscated mechanics or poor translations or both.
--Is the drop rate of items in-battle affected by luck or just the post-battle rolls for leader/second/helper? If so, is it just the leader's luck?
--Tachibana's ability, "boosts acquisiton rate for spoils of war (medium/large)", is that in-battle drops or, again, just post-battle ones?