Yes, the ideology that was ultimately chosen by Heath was the feudal system that combined theocracy and monarchical power.
First of all, of course, it was because it was easy.
Most of the ordinary people of this era believed that there were gods in this world, and even in their eyes, wizards were a kind of god. Even some Wizards themselves also believed in strange gods, such as Red Devil's Blood and Bloodsource.
In short, the god system had a broad base of people in this world. It did not take much effort to promote and make people believe in it.
After confirming the specific ideas, Heath began to draw up a framework for his first sermon.
"...I came with the will of God. My purpose is to spread the gospel to the world, spread the good news, and relieve the suffering of people..."