We're still going to recieve even more qi from killing Xiantains and Shangtains than when we got from killing Houtains. According to TW, killing all the martial artists in poma is enough for MC to advance to NS. I wonder what TW planned with this. That much qi would have just been a drop compared to his power before getting shot down by the heavens. His plan was to take over one of his clones body, then kill the entire population right? I wonder how fast TW would have advanced in MC's body.I think it has to do with how much Qi they have forced out of their bodies/soul/existence/whatever. I mean if everything is made of Qi and the abitants of the POMA world don't receive Qi at all, then all beings already have a certain amount of Qi from birth. In other words, a mortal and a Shangtian have the same amount of Qi.
The problem is, not even a god can completely extract all the Qi from a being, TW mentioned that he had to refine millions of mortals into a dozen Qi Stones. So TW's method is simply a way of making the process much more efficient.
Perhaps this is why there is no fourth Realm, because once you reach the apex of the Shangtian there is no more Qi to extract without killing/erasing yourself.
So Grandpa severed our karma connection with TW right? LC and LDQ makes sense since he's connected to them via his teacher's art. But TW implies he could still take over MC's body? If MC is not connected to TW, then how did TW see his memories when we were seeing his? Is it some kind of resonance? Now that i think about it, MC essentially pushed TW to commit suicide lmao.