It is recommended not to mix other meats when stewing pig brains.
Pork brains cannot be eaten with wine or salt.
However, ordinary people should not eat too much pig brains. It is only suitable for people with weak constitutions and those with dizziness, headaches, neurasthenia, and migraines due to deficiency of qi and blood. Men are even taboo on eating pig brains.
Duck heart itself has a stronger smell than pig brain, and the taste is not good without salt. However, salt cannot be added to pig heart, and pig brain is not recommended to be eaten too much.
So in terms of taste and nutrition, you only need to stew the pig brains in the same way, or stew them separately.
If you really want to put some ingredients in the pig brain soup pot, wheat, red dates, gastrodia elata, Chinese cabbage, lean meat, and shiitake mushrooms will be fine.