Hi Cort & sin,
I wasn't a Revs student in my time despite my interest in history. Although the 30%-40% is a good ratio for any expository essay, I would check with your teacher to see whether the VCE syllabus, or examiners, have a preference.
(sin:) I imagine you are asking about the context expository in particular. There are many ways to achieve complexity, not all of which I can list and explain easily. Try some of these:
- Explore the opposite side to the main belief.
- Explore alternative versions of the same side.
- When you make an assertion, ask yourself why or how; then write down your answer.
- Try and articulate the relationship between the ideas that you form, in order to generate new ones.
All the best,
Yang