Here is Lucrezia's Ravana speed kill, and
here is their parse. Both tanks were going FULL DPS. DRK "beat" WAR by 40 DPS. Dummy parses mean poop. Real fights are what matter.
WAR "pays" for its DPS by losing all of its defenses while doing it.
WAR's "utility" is Storm Path.
That. is. it. People are over exaggerating the f*** out of this buff. You can live without it. It is just Sacred Soil. A lot of the major important raid-wide AoE either 1) happens when the boss cannot be hit (Twintania ultimate after dives, T9 Megaflare, As1 Opressor Jumps) or 2) Can be healed through regardless. Also note that any good WAR will drop Storm Path out of its rotation to maintain higher DPS. Any "better" WAR will apply it for seconds before busters/raid DPS like how BRDs applied Rain of Death in 2.0 before the nerf.
PLD + DRK combos work
JUST. AS. GOOD. Bring a NIN for the slashing debuff and the OT's TP. Bringing another job for a debuff is not new. It is the same as bringing a job for a buff (look BRD and MCN). PLD + WAR still needs monk's INT down if that's a concern. DRK + WAR will suffer more physical damage because no RoH and DRK is pure shite against physical damage.