The only certainty was that after the tribulation, a cultivator's strength would experience a rapid increase for a period of time.
However, Refining God cultivators and Body Cultivators were different from Qi Refining cultivators. Although they also experienced an increase, it was not as consistent as the three tribulations faced by Qi Refining cultivators.
Most Refining God and Body Cultivators who undertook tribulations did so because they also practiced Qi Refinement.
Qi Refinement had always been the orthodox method, not only because it was the most common and numerous, but also because the countless Dharma Methods, shone like stars, almost all belonged to Qi Refining cultivators.
Body Cultivators mostly relied on Divine Skills and their physical bodies. Refining God cultivators had more methods, but these were not comparable to the methods of Qi Refining cultivators by one or two magnitudes.