Don't take measure if you're looking for an easy course.
If you need easy maths cats, you need to look at the modules that have the most people in them. More people mean the exams have to be easier.
Knot Theory, 3rd year essay, history of maths - I'd guess you may take these for 45 cats. Then one of PDE/Metric to make up the other 12 for the 57 cats you need. Also could consider modelling natures, but you're gonna have a pretty terrible year if you take all those essay modules
Business school modules are always a joke. So if you havent taken them yet, either faf/pof for 30 cats.
Problem Solving for 12. Do Math stats A (12) if you haven't taken it already (Jan Exam to get it out of the way). Then some random easy modules for the rest.
RE: PoF, two class exams worth 15% each, then final exam is fine if you've done the seminar qs a few times...