See my dad was diagnosed with stage 4 cancer stomach, that has also spread to the liver, six months ago..
Once cancer spreads to the liver it can become very aggressive, which means he needs to be very aggressive about the cancer. I recommend really focusing on mitosis inhibitors (chaparral, black walnut hull), hyaluronidase inhibition (myrrh), angiogenesis inhibition (ashwagandha) and antimicrobials and immune stimulants (chaparral, pau d' arco, myrrh, andrographis, etc.). But I would not rely on herbs alone at this point. I highly recommend looking in to ozone therapy as well, which is highly effective for advanced cancers and is very safe when used properly.