One set-up I use for the baratoplata is the Darth Vader grip. Give it a try.
More in this mini-series:
Darth Vader Foot Sweep https://youtu.be/GA4N8rcliBU
Darth Vader Loop Choke https://www.youtube.com/watch?v=AqrjmEkqT24&feature=youtu.be
Darth Vader Defense https://youtu.be/cIYObfxSJm8
