By no means am I an expert, but have you utilized the "agility" aspect of your aircraft to its fullest extent?
ie....trying to end up so your "disadvantaged" vs your opponent. That agility is like a free scissors move, believe me when I tell you from an american stand point....I go OUT of my way to make sure I do not end up "advantaged" when fighting agility aircraft....either that or I make sure I have a couple scissors cards in my hand, which murphy's law of DiF states: When you need a scissors you will have a Vertical Roll, and when you need a Vertical Roll, you will have a scissors.
I have come to dread the A6M8, I would much rather fight J2M4s and its +2 damage than face the "super zero" with high performance.
Good Luck, and just keep turning and burning with the zero.