Originally Posted by Ikki

max 100 ampys from a stat, i.e. a girl can have a maximum of 3000 hp from hp ampys, but i dont know if the cap is shared between ampys types

The cap is not shared between ampy types. So one girl can get:

100 HP Ampys = 3000 HP
100 ATK Ampys = 1000 ATK
100 DEF Ampys = 400 DEF