The best brake I have used and have is Shigura M665, M775 or M810.
They are used by Clement Moreno and Euan Beaden.
It's a good idea to install the rear brake on a steel-braided cable.
https://www.youtube.com/watch?v=gKOJvwzVQ4M&t=1s&ab_channel=ClementMoreno
https://www.youtube.com/watch?v=pIRQgEjDaec&t=98s&ab_channel=EuanBeaden