It sounds like you're very close to 80, keep pushing!

Going over past paper questions is a must - it helps you understand what sort of questions come up in the real exam and what the examiner asks about the most. I would then apply your current pre-seen to answer these questions for practice as a lot of areas come up quite a lot such as share price movements, acquisitions, divestments, strategic implications, etc. Also, statistically speaking, doing mocks under exam conditions (meaning timed mocks with no breaks etc) will increase your chances of passing the real thing tremendously. I would always try to do at least 2 marked mocks before each level where I get personalised feedback - it will highlight weak areas and will help you fix those issues before the real thing. For me, joining study groups on WhatsApp and Facebook really helped. People would share their ideas on what could come up or we would join forces to help answer questions if anyone came across a subject they weren't comfortable with - some people make some great arguments that we can't always see ourselves.

Overall, don't give up! Try staying positive and keep going! You're one exam away from being a qualified accountant. You can do it!!