Why is Quietus so weak?

[Saeno]

Comparing unbuffed Quietus to its "rival" Decimate, it's 160 potency vs. 280 potency.

Decimate also crit+direct hits 5 times in a row under Inner release. Decimate is a lot stronger than quietus because of WAR's kit, not just decimate on it's own so I think it's a little unfair to compare them unbuffed. I don't think DRK's aoe needs to be buffed to be comparible to a tank that can deal higher aoe damage than almost all other DPS jobs. I think this is one of the few cases where one job's aoe kit is so above and beyond that it's unreasonable for DRK to be buffed accordingly unless every job in the game gets buffed so hard that 5x inner release decimates seems average.

Going on a tangent, but DRK's aoe kit is also way above and beyond PLD's kit. If Holy spirit is like Fell cleave and bloodspiller, then PLD's do not even have anything similar to Decimate or Quietus. Total eclipse is weaker than overpower and Abyssal and those aren't even the strongest skills on those jobs. Sword oath also does not help aoe damage output unlike Storms eye and Darkside. Sword oath is entirely single target. The difference between PLD's kit to DRK's kit is about as bad as WAR's kit to DRK's kit. I agree that the balance between aoe damage across the tanks is very weak but im sure SE is aware of that.