Good grief, that is some serious infestation. Personally, I did not like Aipstasia-X. It killed the aipstasia along with everything surrounding it including the cool stuff on the live rock.
Peppermint shrimp work, but it takes a few weeks for them to find a tasting for them.
The hot water in a syringe approach works as well, but again you have a serious infestation and not sure if I would have the patience to spend 5-10 minutes on each one of them.
In your extreme case, you are better off "hiring" a File Fish. I don't see another viable option at this point.