well I kinda figured one part of the answer and am posting it here for ur refernce.
Here is a pic of a G9 unique spear

well as u can see, the last option says it ignores opponent's Attribute defense.
Here attribute defense refers to the defense u get from set+she+rings+buffs. i.e., when u r facing a warrior using a G9 unique spear ur defense will be reduced to the dexterity pointss u have an ur elemental defense. BOR is useless. Only HKs can avoid this using raz but a one on one with any warrior using G9 unique spear is a one way ticket to hell. Archers n mages will suffer most.