Originally Posted by
Mirage
Enhancing the effect is a relative term. PLD's effect of "being hard to kill" during invincible is enhanced by -MDT and MDB gear, as well as Shell. Thief's effect of "being hard to hit" is enhanced by evasion and shadows in the case of ranged attacks. Warrior's ability to deal a huge amount of damage is enhanced by every DD gear piece and buff he's got on him. Likewise, Perfect defence would make the entire party harder to kill, and make it even harder to kill those who enhance this effect through gear and certain buffs.
Maybe my suggestion was a bit modest, but I still think that a huge amount of damage reduction is enough to make it worthwhile, even if it isn't 100%. If we change my suggestion to additive instead of multiplicative, granting 75% reduction by wearing as little as -25% DT in gear, and up to 100% if you wear -50% DT, would that be easier to accept?
I can't think of one single buff with a greater defensive boost than this, after all. And do keep in mind that you still resist all status effects such as death and charm at a 95% rate, if you go with the suggestion I gave.