If you're using Cellia (and thus her bonus drop) i believe the most efficient map would be E but don't quote me on that, you might want to do a little map considering each map drop-chance per sta
im doin X because i need good amount of plat spirits probably even close to 100 black and rb are just bonus
i for 1 kept them , but i'm starting to run out of space in all my baracks.
same thats why im asking =) only sams and bishops take like 45 spaces,, together i have probably 300 silvers .. noticed some can be used to lvlup skills of silvers i use but havent dumped em that way yet