I managed to get to the diagonal Board Rend section of the fight.
I played the Gachamachine for the TennaTie like Anon said, but I can't buy the Toxic Axe and the machine doesn't drop Mints for me.
So I have one Mint and one Dust, and the rest is Deluxe Dinners and shit.
I swear to God I'm gonna draw the Knight pregnant once this is over with.