While the Sun Moon Empire was leading in Soul Guidance Device technology, they faced a problem: the quality of their Soul Masters was vastly different from that of the original Three Kingdoms of Soul Land. Had it not been for the recruitment of Soul Masters from the Sky Soul Empire, they wouldn't have been able to form these four new armies. Furthermore, many three-ring Soul Masters were artificially promoted through the use of medicinal drugs, which meant their abilities were not stable.
However, the stability of their strength was not important. What mattered was their ability to use Soul Guidance Devices. That was why the Sun Moon Empire put all their efforts into manufacturing Soul Guidance Devices, striving to equip several more Soul Master Groups as soon as possible. With Soul Master Groups added to the Soul Guidance Device Battlefield, they would possess formidable combat effectiveness anywhere!
