Another thing could be dealing with Arabella. Maybe they'll rethink a DC20 check on that or add in more options, medicine check to save her, animal handling the snake, etc. I know I did a lot of scumming there.
Honestly its a better story if Arabella dies . . . it provides much more drama, gives you a real reason to hate Kagha (and possibly assassinate her), and adds an interesting moral dilemma later in the story.
The 'everything works out' options are often not the most impactful from a story perspective.
