Rick is right.
The per blade balance sets the single blade properties. If you do not do that, you can balance til you drop, but never get the blades to work as a team.
In propellers we cannot do that.
About mass:
The closer to the hub, the more mass is needed for balancing. It makes a big difference where the mass is located. Props that need a lot of balance mass, are too far off in my book, and should be used for stirring paint.