Besides their plan to deal with the angel of slavery, they also have the pathway of telepathy that still needs to be upgraded to rank 8.
So they were considering if they should do all of these things first and become an angel of slavery before going after the demigod undying.
The power of an angel would surely make hunting the demigod undying easier. It would also be better to focus on one thing now instead of scattering their manpower and attention over many goals.
But as they were eating the flesh of the demigod undying, they noticed that they were not gaining as much qualification as they expected from it. This phenomenon made them stop thinking about other things and try to figure out what was wrong.
They couldn't tell exactly how many qualifications they were gaining, but they could tell how much they were gaining compared to what they already had.
