The hierarchy was the same for Spirit tool as well and would be the same for a lot of other things such as pills and formations. Of course, there were exceptions to it, but those were only up to a certain extent. One of them was the four vessels restoration pill that Lin Mu had.
It was a mid grade healing alchemical pill that was effective on everyone from mere mortals to core condensation realm cultivators. That was also the reason why it was so expensive and rare as it would take a mid grade spirit alchemist to manufacture those.
Even for a low grade alchemist, the basic requirement was that they needed to be able to ignite their qi flame. Doing so was a difficult task that would require huge stores of spirit qi and would only be possible for Peak qi refining realm cultivators at the very least.
