It's good at parallelizing sub-agents with well-defined prompts and context boundaries. It makes it possible to use the research -> plan -> implement flow without filling up your context. I haven't written any custom flows yet, I just use archon's built-ins with custom skills.

Here's the video that got me to use it:
https://www.youtube.com/watch?v=qMnClynCAmM&pp=ygUKY29sZSBtZWRpbg%3D%3D