How do you balance out two dosha's that have opposing dietary needs?

This can be achieved by means of studying the gunas (properties) of increased doshas. There are following points to be considered while doing this.

1. Common properties: Presence of two doshas at a time is called as 'sansarga.' Pacification of both doshas is done by using foods with properties that are commonly opposite for each of the two. Eg. If vata and kapha are both increased, you can use hot diet, because both kapha and vata are 'cold' in property.
2. Sequence: When two doshas are present, we should pacify the predominant dosha first and then take care of the other dosha.
3. Let one dosha to increase: We can allow one dosha to increase for some time and when the other one is pacified, take care of the increased dosha later.