@lsteiner2 Can you provide a bit of clarity as to the situation you are explaining? Are you saying that students need to achieve 77% or higher on exams or else they fail? Is that overall on exams or 77% one each of those exams? Do the discussions and assignments only affect students' grades if they have achieved the prerequisite exam scores? If a student achieves perfect on the exams, what are the final weights of the exams, discussions, and assignments?
Depending on the prerequisites to pass, it could be possible to use Mastery Paths in a way to have everything calculate in Canvas. It might take using Assignment Groups that are weighted to zero and No Submission assignments, but it could totally be possible. It just depends on the exact details of how grading is supposed to work for the course.