To achieve this goal of having subordinates capable of reaching the 6th stage of cultivation in the short term, Minos was investing in people who had already reached the 4th and 5th stages.
Even if these people had already learned several techniques and were going to suffer from the adverse effects of changing techniques, it was still worth hiring them.
They would serve as the first-generation leaders of the Black Plain Army, who would lay the foundations for the future of this territory. Furthermore, at least in the short term, they would protect this place from external threats in this northern region of the Central Continent.
However, Minos' focus was on those lower-level cultivators.
That's because they could already have Black-grade techniques from the start, can develop faster, and even reach higher levels of fighting proficiency in the future.