"Hallucinogens and hypnosis, huh?" Rui murmured.
It seemed extreme at first, however, it made sense. It was very difficult to figure out the most optimal Martial body as far as the configuration of physical parameters went without something like this. How else could Rui personally experience a particular kind of Martial body?
The only other viable possibility was some kind of temporary-enhancement potion that enhanced his body in one particular kind of way that would allow him to experience a particular kind of body for him to decide whether or not he was compatible with that kind of body or not.
However, this was an incredibly expensive and wasteful solution. Temporary-enhancement potions were military assets that allowed ordinary trained humans to keep up with Martial Artists. They were not resources that could be splurged on training.
Hallucinogens and hypnosis techniques were much more pragmatic solutions to the problem.