I did Path201 this year as an INIM major and I honestly can't recommend it enough! It was one of my favorite papers for sure. There has been 2 modules cut since 2018 so I believe that its a pretty manageable paper nowadays. The lectures are super interesting, we covered immunology, blood, cardiology, cancer, genetics and respiratory and I felt they tied in pretty well with my MICR papers (some friends doing PHSL also thought it went well with their papers)
It is good to have a pretty basic knowledge form hubs (heart has 4 chambers, mucociliary escalator that kind of stuff) but I would say they taught us pretty much everything we needed. I think it definitely helped me doing the immunology section in MICR too though! I'm sure BIOC221 would help with the cancer/genetics stuff but I didn't feel disadvantaged not having done it either
The internal assessments are not too bad (was my best paper internally) Lab exit tests, a report, and a mid-sem (This hit a few people pretty hard but its right after the break so heaps of time to study). You also never have to stay super late in the lab so don't worry about the 4hr thing!
And it is pretty easy to selectively study for the exam if you wish to do so and the whole thing is either or essays.
Overall I got a similar or better grade in comparison with my other papers so it's definitely achievable and I would highly encourage you to do it!!