"My theory is that get as much toxic out of the body as possible to handle the incoming contamition from the removal. From what I gather so far, candida can be hard to get rid of if parasites exist. "

Don't think about trying to get rid of the candida. It is impossible. Instead think about boosting the immune system so the candida is within normal limits. Parasite cleanses contain herbs that are also very antifungal, which is why some people try using some other antifungal herbs first(such as raw garlic,coconut oil, oil of oregano, cinnamon, cayenne pepper, etc.) so that the side effects from the parasite cleanse won't be so severe.