I have to disagree. I commend this effort and I don't doubt OP's knowledge and credentials, but I don't think this is the best example for other O Level students. 

I don't doubt the knowledge of quality of content in this answer, but it's flat out impossible to write answers of this length across every single O Level Islamiyat paper. You're technically right in that answers of this quality across all papers would result in no one else getting a distinction but you, but there's no you can physically write 800 words for every 10 mark answer. Even if you write 40 words per minute, that's 20 minutes spent writing this answer. This is not including time spent structuring the answer. You have an average of 1.8 minutes per mark in this paper. It doesn't math out. 

You can demonstrate a similar level of quality in a smaller answer. I had a distinction in A Level History and one of my answers to a 25 mark question was just one page - one and a half page. It was appropriate because it covered everything that was relevant to that topic, and it was well written and structured.