Let's talk Dark Knights

[Izscha]

Said no one ever. 10s window to proc, and then you have 10s to be healed to 100% or die instantly. If you get 100%'d too fast, it could kill you due to the mechanic you're trying to cheese. If you don't get 100%'d in time, you die anyway. It's horribly designed, and could be a lot better. An example of how it could be better...

Once your HP hits 0, it's locked to 1 instead for WD's duration with you gaining stacks per attack you do. Every stack will heal you by 20% at the end of WD's duration, and during WD you can't be healed or take damage. When WD hits 0, you immediately get the healing from those stacks with a half second extra invuln as well. This allows the server to push the healing through BEFORE any damage that would take place at that moment. This also turns Living Dead from the worst Invuln in the game into one that requires the DRK themselves to help lift themselves out of danger. If they use just GCDs for this, you can bring yourself up by 60% HP.

That is an example of how they can make LD better. But right now it's not worth using right now, nor ever outside of a premade group, compared to the other tank invulns which you can pop in pugs without problems.

If you need to pop an invincible move during anything outside savage / ultimate, you got bigger problems than "muh LD bad".
They wont balance things for casuals or low skills players, LD is an amazing CD for any raid content and you can cheese a lot of stuff with it and it's pretty strong overall and that's exatly why over the years minus 1-2 Qol stuff the thing never changed and it does not need to change.
The devs rightfully doesn't care if you die of LD in raid 24 or dungeons, it's not meant to be used here.

[RyuDragnier]

If you need to pop an invincible move during anything outside savage / ultimate, you got bigger problems than "muh LD bad".
They wont balance things for casuals or low skills players, LD is an amazing CD for any raid content and you can cheese a lot of stuff with it and it's pretty strong overall and that's exatly why over the years minus 1-2 Qol stuff the thing never changed and it does not need to change.
The devs rightfully doesn't care if you die of LD in raid 24 or dungeons, it's not meant to be used here.

No, it really isn't. With all the Invulns now getting the 10s treatment, it's now objectively the worst.

GNB? Use it, HP to 1, 10s for the healers to heal you up, easily done regardless of pugs or static.
WAR? Use it, HP won't fall beneath 1, 10s for the healers to heal you up while you can also heal yourself up loads with all the HP healing abilities you get.
PLD? Use it, just a straight 10s invuln, no worries for anybody involved.
DRK? Use it, you have to wait 10s in the HOPES that your HP hits 0, meaning if your healers/co-tank don't catch it or you don't announce it in 3rd party comms, it may get missed and get wasted. If it does proc, your healers now have 10s to heal you to 100% health, but you have no damage invuln making it hard to keep track of. If they remove it too early it's wasted for any future attacks you want to invuln which may result in your death, if they do it too late you'll die, and instants have a delay to the heal.

Right there, you can see it is the WORST "death cheat" in the game due to how it works. It can not go off at all, you can not get healed in time, you can get healed too early, all of it can result in its failure. It is the ONLY one of the 4 to have this problem. It is objectively the worst, PERIOD. PLD's have the best due to them just negating everything with no down side.

[Brightamethyst]

They wont balance things for casuals or low skills players

Um... what? Almost everything is balanced around casual play. That's part of why LD is so weird. It's one of the few things that's clearly NOT designed for casual content.

LD is an amazing CD for any raid content and you can cheese a lot of stuff with it and it's pretty strong overall

Being strong in controlled raid settings does not make it good, and even then it's objectively way worse than all the other invulns.

The devs rightfully doesn't care if you die of LD in raid 24 or dungeons, it's not meant to be used here.

So says you. Not everyone is as perfect as you seem to think you are.