1000 hours overall is adequate preparation. If you study 6-7 hours/day that comes out to roughly 5 months of preparation. However, 100 hours per 100 point subject and 200 hours per 200 point subject is something I would not recommend. My reasoning is certain subjects you will be more knowledgeable about compared to others therefore you can spend less time on subjects you are more familiar with and allocate time saved to studying a more complex/less familiar subject.

I like the overall simplicity of your strategy. Definitely modify it as you go along as you see fit. Good luck.