We really need to talk about Living Dead

[aodhan_ofinnegain]

It does, because once you activate Living Dead, at any point during its duration, you may take lethal damage and then trigger the second effect, where damage no longer matters. And once Living Dead is active, as long as you take fatal damage, then you no longer need to be healed for the duration. That gives it a far greater wiggle room, the opposite wiggle room from shorter duration invulns. Contrast with Superbolide. You activate Superbolide and take your remaining HP - 1 in damage to gain 8 seconds where damage doesn't matter. As long as the damage is fatal for DRK, then you have an effective period of time that is longer than any other invuln where no one needed to support you(and if they did it probably screwed you over).

Living Dead is more akin to Divine Veil in that you can pop it 10 seconds before you need it to shave 10 seconds off the next recast, but the actual invuln is the Walking Dead that comes from otherwise dying. Likewise you need a GCD heal to trigger within the 30 seconds of Divine Veil which then applies the shield on the party. So if you pre pop veil 30 seconds prior to needing the shield then activate it via GCD heal 29 seconds into the duration, the next Divine Veil recast is only ~60 seconds away.

If anything Living Dead is a buffer to give people leeway to timing their invuln, something that Hallowed Ground, Superbolide and to lesser extent Holmgang (more responsive) don't necessarily suffer.