You're right. There's plenty of wormers available to rotate IF treating for nematodes. Cestodes and trematodes not so much. I only know of a few wormers available to treat tapeworms, and two for trematodes.
The good thing is that you dont have to treat every bird in your flock, most wont have...
Tapeworms are tough to get rid of, I know you've seen a few of my posts regarding treatments. Attempting to control insect population, especially here in the south is a challenge.
Albendazole used to work well but I believe tapes are becoming resistant to the product and requiring higher doses...
This is the first time I've seen a Proglottid under a microscope, containing thousands and thousands of eggs. It puts things in perspective how a small insect such as an ant or common earthworm can become host, then infect a chicken once the insect is eaten and completing its lifecycle. Great...