Originally Posted by
Lyth
DRK and Burst
On first glance, you might think that DRK can burst whenever they want to. In a very limited sense, this is true. You can pool up your resources and then use them all at once.
But Dark Arts is not multiplicative. It's additive. You gain 140 potency for using it irrespective of how powerful the GCD is. Use it on Syphon, and it's a potency increase of about 1.63x. Use it on Souleater, and it works out to be about 1.46x. Use it on Bloodspiller and it works out to be about 1.35x. It doesn't make your big hits proportionally stronger (out of necessity, of course, because then you would be using it preferentially on Souleater/Bloodspiller). You're better off thinking of it as a 140 potency oGCD than a damage boost.
DRK does not "burst" by pushing out more potency into a smaller set of GCDs. It "bursts" by pushing out a fixed potency boost for longer. Blood Weapon and Delirium just give you resources to sustain this.
This is one of the places where DRK fell behind between Heavensward and Stormblood. Req and IR both represent an additional layer of burst to their respective jobs. Delirium is relatively underwhelming because it has an expensive resource cost attached, and extends Blood Weapon rather than making the window more powerful. You can contrast this with IR after the rework, where a shorter, more powerful window widened the gap between tank dps.
I think that Delirium, as it stands, needs to be reviewed so that it offers something of proportionate value.