Every time I’ve had a full on wipes that caused us to not be able to finish in time it has been because of:
Either one of them, a combination of them or all of them.
Happened when I joined a +14 on my hunter.
I was pumping some serious damage. Tank thinks that means he can pull a lot. He pulls 4 packs. As soon as they all got into melee with him he was deleted. Went from full hp to dead in less time than the healer could cast another heal. Then he goes “Are you guys trolling?” and left, lol.
Ahah, a +14 halls of atonement I was doing on my paladin comes to mind here.
Everyone was tanking the thrash, this was before it got buffed 60 yards and decreased in damage, even though we had 3 ranged in the group.
The tank had a 30% uptime on ironfur, he had like 1/3 of the uptime that I have on barkskin when I tank on my druid, he pressed his frenzied regen far less times.
We still manage to get to first boss with a few deaths, I have full mana and the tank runs and pulls some mobs. I come running popping everything I have, and I do mean everything I have, the tank just gets deleted.
“OMG PALA 100% MANA”.
What I have in mana is irrelevant when the tank gets deleted like that. That damage is not healable. He didn’t use survival instincts, no barkskin, no frenzied regen, no ironfur, NO DAMAGE REDUCTION AT ALL.
I just divine shielded and hearthstoned out of there because I’m not going to sit there with some guy that doesn’t even know what’s happening, flaming me for something that is totally out of my control.
Its MvPs fault, green forum text distracted the tank and blinded the healer
did the dps interrupt/cc the magic?
did the dps used defensives?
did the druidtank pressed a single button?
Some tanks suffer from some kind of delusion of grandeur. They see everyone as the slaves that do the minor work while he is carrying the group as the mighty warrior he is.
Or something
I’m reminded of (and so will repost)…
These dungs are interrupt driven. If you dont interrupt, you are dead. So, it is not only bout dmg.
I wanted to cry. The guy didn’t even know what necrotic even is.
Whoever is to blame, remember to always blame him all at once.
Its MMO afterall, and teamwork is the key.
And that is why I wouldn’t expect a pug dps to be laying down knockbacks, slows or roots 
(Obviously I know many very good dps players who know they can, know why they should, and do the job.)
I love that what the dps actually does isn’t even in-game
Nope 
I’m not going to fall for that. I’m the tank and my GF is the healer I’m not going to answer that question.
Unironically it is usually a bad healer or a bad tank. DPS players typically don’t have enough responsibility to cause a wipe (there are exceptions). Choosing between those two is quite tricky… I’d probably go with a bad tank, I’ve seen more of those.
Well, the only time I’ve pugged any m+ keys was when I was playing on a healer alt and the quality of the tanks varied quite a lot… so I could be biased.
Only a mage could say that…
If there’s a monk, they’re usually decent.
DHs on the other hand? Because of their reputation as being the best, loads of people have rolled one and have no clue how to actually play it well enough for it to actually matter that they picked a DH instead of another tank.
DHs has given a lot more problems than any other tank due to this.
Except when they don’t step into the ring at 1st boss in HoA and get feared into a pack.
Or don’t know about jars on 3rd boss there.
Or don’t pick up yellow spheres in SD and die to unhealable damage. Or don’t avoid being tentacle slapped. Or get hit repeatedly by black spears. Or don’t group up so you all place the floor goo in the same spot.
Then there’s not effectively CCing the big slimes at PF boss 1, not killing the purple slimes at boss 2, or not AoEing the adds at boss 3. Or they don’t kill maggots at NW first boss, or don’t run out of ice ring on the last boss.
Or buttpull an extra pack, mess up the %, and leave you without a pride on the boss on tyrannical week.
What I’m trying to say is that dps have an absolute plethora of ways to wipe a group, just often it happens significantly after they made the mistake. They tend to either require large spam healing which OOMs the healer, or commit to a slow wipe by not handling adds on bosses, or fail to keep to the optimal route. The effect can be several minutes detached from the cause, and as such, a lot of dps players legitimately don’t realise that they are the cause.
Yes I always heal as balance druid and people blame me for low hps and deaths 
hard to keep retri tank alive 
Sure, but there’s still a lot less responsibility on a single DPS compared to a healer or a tank. If a tank makes a mistake, it can easily lead to a full group wipe. If a DPS makes a mistake, it can lead to a group wipe, but most likely just leads to their death (just 1 dps dying in an encounter does not typically lead to a wipe, a tank or a healer dying does).
Although there are more DPS in the group, it is rarely their fault for failing a run, compared to the amount of times tanks/healers screw up the run. Well, this is just in my experience, and you can disagree, but I feel like the moment someone competent is either tanking/healing, the success % of the group goes up by a lot more than if you have just 1 competent dps.
You most often succeed at the run despite them, because they’re being hard carried.
But they do present a huge problem to healers. All of these deaths were by avoidable damage. A bit higher level on the key and it wouldn’t work with someone doing that.
There is no one size fits all answer.