A-level Art for Oxford Physics?

I want to study Physics and Philosophy at Oxford. Currently in year 13, planning on applying 7th term. For various reasons, I have to defer sitting my Further Maths A-level until next year (2024), which gives me the opportunity of doing another A-level fast track in a year, having already (hopefully) achieved A*s in Physics, Maths and English Lit. My first thought was Philosophy, but the only option is Religious Studies. I have heard that this is a lot of content, very prescribed and not at all relevant or necessary to Philosophy at degree level, especially at Oxford. Besides, I'm rather sick of school and A-levels and more mark schemes and exam specs aren't very appealing. My preference would be to do Art, which is one of my hobbies. I like the idea of doing something with more independence and I have heard that A-level is a lot more research-based than GCSE and has a more academic side to it. I was thinking of basing a project around Mathematics and Art in the natural world (fractals, golden ratio, Da Vinci, etc.) as something unique to talk about in my personal statement. However, I have been told that A-level Fine Art is considered a really soft subject by Oxford and it will degrade my application significantly, if not blow it completely, even if I get a strong PAT score. Does anyone have any thoughts about this? Thanks!