At least on Aether, half of the Flames are bots (no proof, just the feeling I get after watching them in action).

Adders and Mael at least seem to be mostly comprised of actual people.

Best example - I see this almost every fight. One random Flames just charges into our big group on mount. Like makes a bee line right into us as if they're autoprogrammed to head to our base. When attacked, they just keep moving on their mount like nothing is happening.