Which optional paper should i choose with P3

I agree with aadzer, you will find a fair amount of overlap between P3 and P5.

around 30% P3 and 50% F5 overlapping in p5…
take P5 with P3

P5 = F5 + P3 + (a lil bit of inv apraisal of) F9

As long as you didn’t hate the theoretical aspects of F5, you ‘ll find it repeated here. P5 moves drastically away from variances et al to evalating advantages and disadvantages of systems and there’s also emphasis on human behaviour in organisations; it’s a relatively interesting course. You certainly won’t pass this paper if you like not theory. An exam question in the past has asked how to evaluate . .. Using porter’s 5 forces. Just use calculations to support your application of the model.