De rebus bellicis and my Latin ebook of facsimili Notitia mention some Scythed chariot and how to utulize them. I have no idea whether they tried and quit the idea but I have not met any roles of them in any battles. In fact, it could be a fun to see them in battles.
For the ones who are interested I have some pictures. The book is in latin that means I it takes ages for me to understand it via translators unfortunately
Spoiler Alert, click show to read:
Spoiler Alert, click show to read:
Spoiler Alert, click show to read: