Refining solo speaking: Moving beyond the partner restriction

I've been reflecting on how to practice speaking when there’s no partner available. While the seigen (restriction) of a solo environment can feel limiting, I treat recording myself as a form of shoumei (proof) that my intonation is evolving. I try to let my thoughts flow like mizu (water) to avoid stuttering. Does anyone else find shadowing helpful for refining these nuances without external correction?