Where else to end it than with the big cheese himself?
In the Patreon campaign, the final confrontation was absolutely amazing and left everyone with an exhilarating experience under their belt.
So question is where can I go from here? There is the possibility to expand the Table Scraps for Red Hand of Doom by a bit more, since there are numerous NPCs listed in the Adventure Path who are there to help the players in their quest and can find themselves in the middle of action when it comes to protecting the vale. But those can be easily replaced with existing NPC statblocks.
Otherwise, I'd default to continueing my usual approach of delivering you whatever I used in my previous sessions from the patreon game!
Enjoy!