When I was a lower level, lets say like 30, i had a 39% spear skill force magatama. and a 23% spear skill force magatama. Both added attack points. Over levels the attack points from the magatamas started to fade (lower). Eventually the 39% didn't add any attack points so i unequipped it. Now im level 47 and the 23% mag lowered the attack points to a point where's it close to being useless.
Can someone explain this?