You have very good super curriculars and seem to be absolutely locked in. I would say that you shouldn't be too focussed on pure stats though, your TSA and interview is what matters at the end of the day, and if you get too angsty about your grades you are more likely to clam up in the interview. I just got an offer from Oxford, and I have worse accomplishments than you nearly everywhere (A*A*A*, all 9s and 8s, TSA 80 in the actual thing and definitely nothing close to your podcast and blog). Oxford is not impossible to get into, and someone whose personal statement is "I read this and I loved it" is going to be completely fine compared to a "I write this blog and do this podcast and shadowed an MP". Don't sweat it so much- they want academic, passionate, personable people, not robots with all of the qualifications under the sun and terrible cases of burnout. Hope that the application went well!