I recently got enhanced award on first application for both elements. It took lots of homework beforehand. You sadly have to really focus on the things you struggle with - even if you have found a workaround. The descriptors - study them. Citizens advice describes the reliability test - make a sign with the headings. I stuck sheets up on my wall to remind me of difficulties in each category. Front and centre was the reliability test prompts. So when you say yes I can walk 50 meters for example - you then add, but I am slow, I use a rail for support, or I can’t safely or repeatedly do it etc. I heavily emphasised that what I am capable of fluctuates and doing one thing often then means I can’t do other things.
Be prepared for a mental dip too - it forces you to focus on negatives. Good luck with it