Where can I get Paramata Bhanga of Vedanta Desikan in English? What are the various schools he discussed there?
You can read an English translation/commentary of an abridged (subset) version here.
The various schools refuted here are:
- Madhyamika Bauddha
- Yogachara Bauddha
- Sautrantika Bauddha
- Vaibhasika Bauddha
- Prachchanna Bauddha (Nirvesesha/Sankaran Advaita)
- Bhaskara / Yadava School
- Gautama Nyaya
- Nirishvara Purva Mimamsa
- Nirishvara Saankhya
Apart from refuting the above schools, the school of Pancharatra is defended as well.