We really need to talk about Living Dead

[ArianeEwah]

No, not it entirely is not.

Yes, it is. You said GNB "***ALWAYS***" needs a healer. That is simply not true. GNB does NOT "***ALWAYS***" need healers intervention.
Back to E7s example: Aurora heals for roughly 35k if no regen tick crits. Brutal Shell heals for ~4.4k non-crit on hit, ~7k crit. On average, Brutal Shell heals for ~40k from the first tank buster/Superbolide usage to Betwixt, and you get 2 Aurora squeezed in. That's roughly 110k healing in ~2 min from GNB alone, and that amount is more than enough for the tank/healer stack.
So, it does matter whether GNB is MT or OT. You can leave them alone if they are OT.

The thing is: it's not used in actual practice. But that is a problem with pugs/non-optimized parties, not with the theory. I see so many White Mages using Bene on GNB OT when they should actually save it for the 2nd buster ~2 min later. Because if that hits a WAR or even DRK who are holding aggro, and they invul, it will require way more ressources to heal them. (On the other hand, I can't even blame them for their distrust on pug tanks. I've seen tanks not using a single cd during add phases there, even tho they don't need them for 2/3 min.)
I could go in E7s as GNB OT with a some friends and tell them to NOT heal me after the first invul, and there would be no issue. The first actual heal would be AFTER the stack before empty wave hits *just like the rest of the party*.

[Lucy_Pyre]

Yes, it is. You said GNB "***ALWAYS***" needs a healer. That is simply not true.

GNB cannot heal its own health bar after a buster back up to a safe level in a short period of time. GNB therefore always requires the aid of a healer when using Superbolide. You are mistaking long-term minor healing as serving the same purpose as WAR's burst healing. The two are very different things and cannot be equated to one another or used for the same purpose.