So a player asked me this interesting question. He currently has the Assurance feat for Medicine. He asked me how it would work with Risky Surgery. Basically the way it's written it would act as an auto-crit for treating wounds. In his own words:
"Specifically, I know I don't get the +2 to the check if I use assurance but does it still modify my success into an auto critical success. The basic thought process I have on this is that assurance only cares about the roll. Once I get the success assurance is done and risky surgery is free to modify the result of the roll; generally a success, into a critical success."
Honestly, the way the text is written it doesn't look like it clashes but as a GM that seems a bit broken. Thoughts?