I'm not doing the same topic but the structure will carry over. Focus on around four factors (you have already done this), and then do a paragraph on each. Ideally begin with the most significant factor and end on the least significant factor. Then of course sum up in a conclusion - but don't introduce new evidence in the conclusion. The conclusion shouldn't come as a surprise to the reader having read your essay.
If you can compare two factors within a paragraph, that will help your grades - this is a lot more simple than you would think, it doesn't have to be a complex comparison. I don't know about Tudors but I could give an example from my Stuart England course. For example if one factor was religious policy, and another was foreign policy, I'd argue that religious policy was more important because religious policy was significant in James I's foreign policy, for example his support of the Protestant Huguenots.