cleansing and flushing the the liver will help the spleen, definitely.
If you do Clarkia , then you should keep up with the P&B shakes to push the parasites out as they die. If you don't want to see them, then consider taking food-grade diomataceous earth. That will cut them up into little bits.
You should be able to take small amounts, like a teaspoon, of chinese bitters and one dose of the livatone plus no problem while taking the Clarkia .
Everyone should own an enema bag at the very least. They are excellent for colds/flu, and for when you just don't feel right. Flushing the Colon Cleanses the entire body. If you start feeling uncomfortable on any cleanse, drink lots of water and that should help if you decide not to go with enemas.