Hovering in the skies of the Purpleflame Territory, Vaan and Valefor continued to spar and learn from each other. They both understood each other had their strengths and weaknesses.
In Vaan's case, his weakness was that he had not achieved the realm of muscle memory.
The realm of muscle memory was a state of mind that required constant polishing to maintain. After all, new knowledge was learned every day. Without absorbing the knowledge properly, it would consume more time and energy to use.
It was similar to the difference between a messy folder and an organized folder; information from the organized folder was quicker and easier to find.
Meanwhile, Valefor did not seem to have any apparent weakness after mastering control of his True Divinity-level body. He had polished his realm of muscle memory and entered the realm of minute subtlety.
However, that didn't mean he couldn't improve further.