Not familiar with that system, but perhaps I should lol.
Since making the OP, I've made some significant changes. Including some that folks mentioned above (like getting rid of spell points and making pretty much everything powered by vigor. I also think I'm happy with my solution to avoid death spirals. By using desperation points that can only be used when you're wounded, you actually have more options to use, which helps offset the action point penalty you get from getting wounded in the first place. One of the big goals I wanted to do was to give players a lot of choices in how they use their resources.