Please just... Just change Living Dead

[Carighan]

An invuln meanwhile, like any other defensive, serves no purpose unless it provides actual sustain -- be that in the form of mit [max and current HP increase, barrier, or %DR] or healing [percentile like Macrocosmos, target-health-based, or SP-based/flat]. Preventing all incoming damage once already at 1 hp via Holmgang or WD's death-prevention is sustain. If it doesn't actually manage that, though, the invuln was wasted; mere 10s of peace of mind (collapsible with the auto-attack immediately after) is not an effective use of an invuln, and parity should not be judged according to each skill's least effective use.

And yet here you are, not actually wanting Hallowed Ground and Superbollide to be changed to block incoming shielding, lest their sustain is wasted.

It's a weird argument, isn't it? Why is it a waste if LD doesn't get to provide you 0-5 GCDs worth of healing and if you "never die", yet somehow the other tank invulns aren't a problem if external sources cause you to not actually mitigate or mitigate much with them (WHM AoE Stun spam, shields, big burst killing the mob group too quick, anything really).

Because, and yeah sure, maybe this ought to be a universal thing? If you press your invuln, you are guaranteed to get the maximum sustain it could have provided no matter what? But then how would that work? After all, a healer would rightfully be annoyed if a DRK griefing by pressing their LD mid-ability blocks their big 3m CD benediction. Would heals "slide off" to other targets? What if none exist? Would CDs be refunded? Should invulns refund their CDs based on how much damage you took vs how much you could have? Like, only take 30% of your HP as damage during your 10s invuln -> get 70% CD back?

... now that I think about the last one sounds kinda interesting as an idea, especially if it also applies to healing and damage CDs if they overheal or overkill.

(edit)
How universal is your view on this, btw? Like, Shadowed Vigil is guaranteed to provide its big burst heal as it works exactly like Excog, right?
But, if healers keep you up enough to never drop below 16%, that 20% HP-increase from Great Nebula on poor GNB did nothing, right? How would that be changed to ensure it isn't, well, wasted mitigation? And if not, how is that not wasted optional sustain but LD's self-healing is? And don't get me wrong, if applied universally I can see the point behind your argument, but that'd be a lot of cases of "potentially wasted bonus sustain/mitigation" to cover.