Except Delirium is only usable when you have the buff up and running, and not on CD. As I stated in my answer, DA/Carve and Spit and Delirium are the only meaningful choices DRK has.
My second answer was just following the rotation, to always use Dart Arts. If you wanna include TBN in there, that is fine, I'll concede that to you, but these "priorities" are not in the core rotation. Delirium has a 2 minute CD and Carve and Spit has a 1 minute CD. These "choices" don't even happen often. I can give you tons of priority based examples in PLD/WAR, and they have 3 combos. DRK doesn't have a priority based rotation, but if you want to believe it does, i won't try to change your mind anymore. If you want to see a real priority based rotation, try BRD or MCH, or even SMN.
Except you can establish enmity with Abyssal Drain just fine. As I said previously, it generates more then sufficient enmity then you need.
Except the situation doesn't come up regularly, and the use doesn't justify keeping it around. It is an underwhelming ability.
May I redirect you to this thread to argue why Dark Passenger doesn't need a buff? http://forum.square-enix.com/ffxiv/t...Knight-changes.
I see you posted in the thread, the OP literally mentions that it serves no purpose other then to destroy your mana pool, and yet you didn't say anything about how Dark Passenger is "fine."
I'm not moving any goal posts, I'm arguing that Dark Passenger needs a buff, and I provided a suggestion with how to buff it, and you are telling me that it is fine.
Except you can never do both. It is either or, they are mutually exclusive. Unless you are constantly swapping in and out of Grit to do both, (which would be ridiculous) you don't really have a point. Point is, they have the same function, they work differently, but they accomplish the same thing. There is no "option", it is either Price in Grit or Weapon without. If they had the same recast, then there would be an option. and that isn't what I would want at all. DRK doesn't need multiple abilities that are mutually exclusive and redundant. So by making them one button with combined effects, you don't lose anything. You just lose the ability to do them at different times, which is fine. Pre 4.0, you were always casting Blood Weapon and Blood Price at the same time when you weren't in Grit, because why not? You need MP, and both of them give it to you.
Enmity and DPS combos have different functions, and accomplish different things. You can't relate the 2. I've said it multiple times and yet you still compare the two, as if enmity and damage combos have the same function.
And as I said before multiple times, Abyssal Drain establishes and maintains enmity, if you don't believe me, run a level 70 dungeon without Unleash on your bar, and see if you have problems establishing enmity. You won't unless you are missing your Abyssal Drains.
At this point I'm just repeating my arguments to you and you can't see my point. Either you are playing devil's advocate and trolling me, or you really think DRK redundancies and underwhelming abilities are fine and don't need to be touched. (That is a fine opinion to have, i'm just not going to agree with you.)
Either way, continuing to try to explain to you my points isn't going to result in any success.