Inside the Final Duel: Maul Vs. Ahsoka
https://www.youtube.com/watch?v=-k5lHp6g77s
“Dave Filoni, executive producer and supervising director of Star Wars: The Clone Wars, along with cast and crew, discuss the making of Maul and Ahsoka Tano’s climactic battle on Mandalore.”
Pretty short video (4 mins long), but there’s plenty of BTS footage of Ray Park and Lauren Mary Kim performing in mocap suits, plus a little from the rest of the process.