RG does advise to do a liver flush before the Humaworm, so your on the right track with your battleplans.
I do however, recall him advising a poster to hold off with the coffee enemas until a week or so AFTER the humaworm course has ended, as with normal liver flushes.
I personally, prefer to do the coffee enema thing, and wait until a week or so after I have finished my humaworm, and I have just completed my second round which was a breeze compared to the first.
I think the second time round was made such much easier because I had been drinking Humanatea for several months, also use it in an enema when I feel the need.
YOu could possibly use Humanatea in an enema during the Humaworm course, it really helped me when I felt like I had a blockage, whilst taking humaworm.
Good luck with your battle, we'll be here rooting for you so keep us informed.