So what are the possible scenarios at this point?
A) Slately sacrifices himself but Jetstone lives on.
A1) Don contacts a moneymancer in the Magic Kingdom to make the gem for him, knowing Caesar and the warlords will have his head for it. Bunny agrees to help him do it because she knows Don's feelings for Bea and the discussion with Slately, and believes Caesar will forgive her for obeying Don's orders.
A2) The money comes from Charlie, either as a bounty for the Archons (dedicating archers plus air units to eradicating them) or as a loan.
A3) Ossomer turns back to Jetstone, and his heir status is automatically restored. Slately agrees to let him become King if he makes Tramennis his Chief Warlord.
B) Both Slately and Tramennis escape and survive.
C) Some plot twist with Parson's hippiemancy.
D) Jetstone ends here.
Personally, I still think A3 is both the most likely and the most interesting option. It would also make Jillian's capture of Ansom more interesting. You just need a Text Update very-soon-now on Ossomer's thought process to make it work. And Wanda's reaction alone would make it awesome!