Maybe this will gear some towards showdowns. Also made a stage 1 vid, which goes over showdowns more in depth. Vid below outlines everything with a slide detailing time, xp and stubs you can earn. Stage 2 is MUCH EASIER/FASTER (all on veteran). Even with March to October giving out better rewards, (based on time) showdown is still the better option for vouchers.

https://youtu.be/nQ2H9TKlY2A