I think ideally this is the highest -PDT you can get on WAR:
Atlas +1 following the earth path grants -11Pdt
The set actually overshoots the -50% cap, but marginally, and since Defending ring is part of it, I wouldn't get too worried about it on a more realistic build. (I'm just trying to give you a basic idea of the gear options)
Some Dark rings from Abyssea come with very good augments (up to -6 reductions I believe).
The -4% pdt from
blitzer poleyn and the -3% from
darksteel subligar +1 actually make them better than Inmicus Cuisses for -pdt, and the same can be said about
ruffian leggings VS Askar Gambieras, but considering how often you'd find yourself tanking or trying to mitigate dmg on WAR, I'd try to save storage with straight -DMG gear.
For -PDT you could go for the Versa armor set, which is much easier to get.
I'll look on other gear rq to make sure what varies for -MDT and Re-Edit this post.
As with the pdt set, the legs from Merman set grant slightly better damage reduction than inmicus.
I didn't bother adding Defending ring since these other 2 options are much easier to obtain still. The same consideration could be made about
Bravura of course....
In areas outside abyssea, provided you meet the requirements,
resentment cape is better.
Ta-Daa