I manage the pptu.lefora forum and have read countless stories. Protozoa as a class of parasites share similar properties meaning what works for a specific parasite well may work for another.
The people who have eradicated them have tried different combinations.
If you read Dr. Stensvold who is a leading researcher, he has stated that there is no defined protocol that works.
Alinia with Paromomycin is a good combo, Alinia/Ivermectin/Doxycycline cured another.