4. nuts, beans, and other legumes. 5. cheese, dairy products, including eggs. 6. fish, seafood. Note that meats, especially red meats are the 'heaviest' foods. Generally, foods which are harder to digest, or which are higher in protein are 'heavier' than those which are not.
Animal products are heavier than plants.
However, the 'heaviness' of foods is not directly related to the amount of caleries. What this means is that for various reasons, the heaviness of food in your diet will affect your magical experiences. Conversely, emphasizing heavy foods in your diet, or eating larger helpings, may help to 'bring you down to earth' should you 'rent the veil' too much. These are generalizations, of course, and it may take a number of days of dietary change before you notice much effect. I do not advocate radical dietary changes, excessive fasting, or malnutrition.