I am in zone 9. I prune,remove leaf my cherimoya and atemoya at the same time. At this time my trees still have fruits,so I let the fruit develop more before harvest off season fruits ,then prune and remove leaf. I would keep 10_20% healthy looking 🍃 on tree. You could add the way you prune your trees, different varieties fruits set...taste test...comparison...later on when the time comes. Wishing your passion for plant and your channel grows strong for years to come.