It's your choice. When I did the Humaworm parasite cleanse, I stopped and did a Liver Flush half way through and about fainted when I saw all the parasites that came out. I felt like it made the second half of the parasite cleanse easier on my liver as the Liver-Flush decongested my liver of all those dead parasites.
The flipside of the coin is Humaworm recommends that you wait to Liver Flush till about 5 days after you finish the parasite cleanse. SO, my suggestion is to listen to your body, and Liver Flush accordingly.