DRK + War

[theamato]

I'd like to see a link to how those calculations are done. Because increasing your character's STR by 10% does not increase damage by 8%. So unless monsters use a different system...

Furthermore, even if that's true, that's only physical damage it's reducing, not magic. Reprisal does both.

uhh, you go up to a physical attacking mob, turn your back (so no Parry or Block), and let it hit you with AAs.

then you go up to the same mob, apply Halone, and let it hit you with AAs. with your back turned.

voila, results. repeat until you have a comfortable sample size.

as for Reprisal, it has far less uptime than Halone (67% if you Parry at the first possible downtime moment). it's good but it cannot be relied on like 100% mitigation.

[Sokerimuro]

What no one seems to bring up here, and is of utmost importance in a discussion such as this, is the Golden Rule of tanking. Repeat after me:
Spikes kill tanks!
Nothing else. Tanks do not die to autoattacks or steady boss damage. Unless the boss has powerful repeating physical cleave or exclusively physical tank busters RoH str debuff does not compete on the comparison.
It all boils down to what kind of damage the predictable spikes deal/what is the raid damage made up (in most cases this is magical)/does your setup have a MNK. I am MT of our static, and bringing up my DRK to use both PLD and DRK maintank whichever fits better the encounter at hand. Also our static does not sport a MNK.
Dark Knight definitely has the tools and the potential is there.