i'm working on a bot right now that helps with this
i got black panther on day 2
but i can't seem to post links or images here...anyone know why?
i.harem-battle.club/images/2017/12/01/FsI.png
Nice. I got her on day 2 also. I think day 3 or 4 is when they reduced the encounter rate because the first two days black panther appeared most of the time.