I think how to create an optimal study timetable depends on a lot of personal factors, such as when is your attention span best at, concentration span etc (which in turn determines both when you start studying and how long do you study at one time), but I think you should always prioritise-subjects which are the hardest-prioritise understanding knowledge rather than just rote learning it, and understand the logics behind different subjects-i.e. how to approach different types of questions in every subject-learning and perfecting problem solving approaches-regardless of what subject you are studying-is going to be a lot more effective than just ad hoc completing exercises without a parti. end goal in mind. All the best of luck-and remember quality of study is always more important than quantity.