The plan of the angel of telepathy to win was to raise some demigod telepaths secretly to help and to get the assistance of a god to help him subdue the Mind Palace. Both plans have been working well.
The war between the nobles of the Wessex kingdom and the judges of the church of justice was a good opportunity for him to advance his second plan. He was able to do the Wessex kingdom a favor and earn the favor of the god of disaster.
He was hoping to take advantage of the upcoming war between the Church of Justice and the kingdom of Wessex to earn more favor, so he had been busy preparing for it.
His busy work trying to prepare for the upcoming war and the fact that he would be sent out of the Mind Palace by the combined might of the demigods if he appeared there were why he was unaware of what was going on.
