5.0 Dark knight request: Delirium rework

[Satarn]

First effect - lasts 6 seconds: Delirium
Records damage taken. Barrier damage and damage reduced by abilities is still recorded.

After Delirium, second effect lasts 10 sec: Fervor of Pain
Reduces cooldown for Bloodspiller and Quietus by 0.5 seconds and removes their Blood Gauge cost.
Increases the damage dealt for the first Bloodspiller or Quietus used during this effect by 60% of the total amount of damage taken during Delirium, while additional uses of Bloodspiller and Quietus have their damage increased by 15% of the total amount taken during Delirium.
Bloodspiller and Quietus restore 600 MP per use during effect.

- Tying a damage cooldown to damage taken is terrible, especially if it's going to scale. It requires you not only to take damage every time Delirium goes off cd in order to use this(have fun if boss is doing dps/healer targetted mechanics at the time, even if you're MTing, or oneshots or stuff that gives dmg downs), but also encourages eating any extra damage possible, like aoes and vuln stacks, in order to maximize the output of the buff.
- Reducing gcd by whole 0.5 second would drop it under 2 seconds like GS4 MNK and make double weaving terrible even with good ping, which completely screws up DRKs biggest burst window(whenever Delirium lines up with 60 seconds cds), which is chock-full of double weaves. I'm all for DRK getting even a full-uptime speed buff, but not this drastic.
- This would likely force DRKs to stack way more SkS than other tanks in order to fit sixth BS into the 10 second window, which is a massive pain in the ass if you wanna multi/omni-tank.
- Even at 60/15% you're still potentially adding a shitton of dps without taking anything away to keep the total in check(and taking away to balance would be impossible, with how this buff is dependent on encounter and rng).
- You still end up just spamming BS. Riveting.

Basically it's a lot of overly-complicated mechanics on the skill, which add nothing interesting gameplay-wise, break things and you still end up with an Inner Release clone.