I have been thinking about the advance Internal Energy Cultivation, Does it truly promise great power?
Most people probably think that thing such ase the 9 Yin, 9 Yang, and YJJ helped fighter like ZWJ, GJ, and YTZ to gain incredible power. Like those who could just get a hand on these internal energy cultivation, their power would just become unbeatable.
For 9 Yin, I think only GJ and HR trained this type of power. But HR's inner energy is incomparable to GJ. The rate at which she increase is much more lower than GJ. GJ took only about 13 year of cultivation and could be said past the greats in term of internal power.
For 9 Yang, it would be ZWJ and JY and maybe Z3F but he didn't learn the complete 9 Yang, so I will leave him out of this. When people saw ZWJ power from training the 9 Yang. People actually think that it is actually greater than the 9 Yin. If it wasn't for the bag, where ZWJ got trap in his power would not reach the level of the great with just 5 years of training. While JY took much more years of training(don't know how much) to achieve the same level. Actually not really bad. If ZWJ was to train it correctly, he would only grow at the rate of JY or maybe faster.
For YJJ, only YTZ, JMZ, LHC, and the shaolin abbot during SOD have practiced this technique. JMZ due to his other internal power conflicted, wasn't capable of mastering this technique, so I will leave him out of it also. When comparing YTZ, LHC, and the abbot, YTZ is far beyond these people. But if it wasn't for the poison energy inside of him combined with the YJJ, his power would never grew to the level of XF within a year. As much I hate to say this, he does have talent(or luck) in combining two opposite energy together. While LHC and the abbot with only YJJ, barely got anywhere.
It seem that these great power really depend on the types of people training it.