It took Dyon much less time to finish balancing the world core of the world of yin wind. There were two reasons for this. For one, the world was several levels weaker than the Dark Flame bubble world and was mostly unoccupied. As a result, there were less complexities that came from outside interferences as well.
However, this was only the first reason. The main reason was because Dyon's comprehension of fundamental runes was increasing at astonishing speeds. Despite the fact he knew nothing of yang earth energies as well, his ability to infer and deduce became more and more devastating as he learned more. His ability to draw conclusions from inferences could only become more potent that more world cores he balanced.
It took Dyon over 10 years to comprehend the desert world's core, 30 to balance the Dark Flame bubble world's core, and not even 5 to create a star of yang earth fundamental runes that turned the violent yin wind world into a gentle land.