From what I understand... It seems that Yuhao is very strong. He has OP abilities. BUT, he doesn't have the spirit power needed to use it. After using an OP ability sure he is able to defeat someone 20-30 levels above him but it drains a lot of spirit power within him. If I had to use an example then a good one would be like in an RPG. The abilities take up mana, the stronger the ability the higher the mana cost (most of the time). It seems that Yuhao got a treasure of OP abilities but doesn't have the required mana to use it without being drained. So if he wants to be strong fast then the best way is to get more spirit power (if that is possible).