Healers who rescue pull tanks into mobs.

[EaMett]

Thank you, I know that since lvl 74. I am very sorry that you did not read my messages clearly before writing an answer. Okay...

You cannot just spam Recitation, Sacred Soil, Excog, all of this. You using a combination of several skills that are ready, depending on the situation. I'm sorry to have to explain this here so many times. You can hold parties and do off-dps in several ways, and without SS also. None of them are prohibited.

If you're going to need to use a stack past Lvl 78 you get more from using SS than lustrate. That's all there is to it. Yeah, you can use lustrate instead if you want to, but if you're going to debate optimizing dead content like dungeons and debate optimal use of ED. Optimizing how/when you use your stacks for healing is a good start, and never touching a GCD heal is a must.

Tank busters also do not exist. It is a myth. Especially missed tank busters. And DPS never stand in AOE. And every beginner knows the dungeon very well and does not make mistakes. You and I are pink ponies, and Scions bots graze around.

Yeah, it kinda is a myth. Place your fairy on your tank, WD/blessing/consolation/union/whatever appropriately and you're done. If dps stand in bad or your tank messes up you'll eventually have to use a stack. Big deal, you've got plenty of them. A class that has most important cooldowns sitting at 30s and gets a stack refresh every 60s doesn't need to hold anything for bosses in dungeons. If anything, you hold stuff during the boss for the following trash pulls.
If your groups are consistently requiring you to hold stuff for bosses then I don't know what to say, you're really unlucky.

I would rather do it for real rescuing someone instead pulling the tank back and forth to the bubble, especially when they does not lose much HP. The problem, again, is that some people are imposing their playing style on other players. And such discussions are further evidence of this.

Either way, someone is imposing their style on others, from the tank that doesn't want to do large pulls or stand in bubbles, to the healer that yanks them around. I'm going to sound like a broken record but, it's not a big deal either way.

It's very situational, and not even a discussion until lv78 when the Regen kicks in. SS can kind of be looked at like a mitigative CD you use when your tank does not have one available, or simply is not using their mitigation tools. What this means is that in this case, your SS at best is helping to make up the slack created by your tank because your AF skills will always be more optimally used on Energy Drain.

In theory, it would seem like SS is very valuable on large pulls due to the constant barrage of auto attacks the tank is receiving. However, for very large pulls, all or most resources should be available and a good tank will know how to cycle their CDs to mitigate damage in a way that you don't have to burn up your AF on SS or Lustrates. This is even more true once getting Seraph, which makes large pulls a joke.

Not entirely sure if you're arguing that SS becomes worse than lustrate with diminishing returns from mitigation stacking (since SS vs lustrate was the original discussion). Or if you're just saying not to use SS or lustrate.
If it's the later, I totally agree buuuuut lets not forget that we can take that reasoning pretty far. Yeah, sure, if your tank knows what he's doing you don't need SS or lustrate, but if your party knows what they're doing.. well.. you don't even need to be there, they can replace you with a dps.