With the next 400 years inside Yang Rai focused on increasing his little world spirits number. He would need more to continue harvesting the resources that would later be generated by various producers in the future.
His wives were all quickly becoming Open Heaven Realms of Rank 8 or better. This was largely due to him forbidding them to become rank 7 first. It wasn't a good idea when he had the means of helping to temper their foundations for higher direct promotions.
Some of his many wives Foundations were slow to improve but only because of how it works. They must take breaks once in a while to avoid any side effects. It would bathe your body in the purest of energies tempering its strength, endurance, beauty. It would also simultaneously temper their cultivation further strengthening their Dao Seals. This was easier for those that practiced the same Dao's that anyone in Yang Rai's world has done before. Otherwise it would be quite difficult.
He also had several wives that hadn't even become great emperors yet. The reason he accepted them even though their talents were low was because they had a different great dao than anyone he has ever promoted in his world. Thus further strengthening himself. Their own innate talent wasn't really a factor anymore and his wives all knew that.
For the ones who didn't have a similar dao to many of the great daos Yang Rai could now be considered an expert in, they took the whole time tempering and training. With many others there in the same situation as well as many who would help them along to condensing their seals. It took a total of 1000 years. However when they did condense their Dao seals Yang Rai could tell. They were all easily capable of handling a 6 rank promotion right away.
At the end of the 1200 years Yang Rai had very few Wives who weren't High Rank Open Realms. The elders who came along with him had established the High Heaven branches all around the Artifact World. Each of them had trained over a thousand disciples with the help of Yang Rai's many wives. As such there were now 5000 Open Heaven Realms all with various abilities.
None of them would be considered to be peerless geniuses however with the fact all of them were directly promoted to the 6th and 7th ranks this was a great and powerful force. They all were shown glimpses of what they would be helping to defend humanity against. It had been a creed in his world.
"As a High Heaven Disciple, I am a Pillar. One of the many that hold up the sky. I am a brother/sister in the Heavens. I am a shield to defend against corruption. I am a sword to kill evil. I am a High Heaven Disciple."
This was the creed they all had to speak and swear to uphold and live by. They knew that they would eventually fight against the Ink Clan. The men wanted to impress the women. The women wanted to impress their World Master. It was something that they all wanted.