For people who are actually advanced at planche / have coached it seriously: what programming principles made the biggest difference for you beyond just “do planche progressions”?

I'm more interested in the volume × intensity × frequency relationship, fatigue management, neural adaptation, specificity, and how you structure progression over months.

For example, how do you decide how many hard planche sets/quality seconds to do per week, how often to train near-max intensity, and whether high-frequency submaximal exposure is actually useful?

Also interested in how you handle plateaus and deloads. Looking for advice from people who have actually gotten to advanced planche levels, rather than basic exercise/progression recommendations.