Flush Them Out

This is probably one of the biggest offenders of a broken and just plain overly hard quest.
As a Feral Druid (now Guardian for the sake of just completing the quest), it's by far one of the most hardest quests I've ever had the displeasure of experiencing. There are MULTIPLE things wrong with this quest:

#1. Crabs are insanely OP. If there's a pack with a crab (3 out of 4 pack spawns have a crab), you will probably die. They have a giant cone AoE stun that lasts for 4 seconds. That doesn't sound too bad right? Except you're tanking 3 other mobs, including this crab. Bonus points if the 2 crabs chain this 4 second long stun move. Don't forget that the Undead mob's have a root. Have fun avoiding it! It should also be said they have 150K health at level 120. Normal mobs have 40K.
#2. The quest just flat out doesn't want to work sometimes. You can kill every mob in a pack and it won't count for the quest. This may be due to the Undead mob using a Suicide move which cancels out you "Killing the whole pack" for the quest, since you technically didn't kill the Undead.
#3. If anyone, and I mean ANYONE helps you with the quest, or even pops up in the location you're clearing, you somehow have an even lower chance of getting quest credit than usual. Don't ask me how this works.
#4. The Strain gimmick doesn't even work in the area. I may have just gotten unlucky or glitched with it, but this is supposed to be a thing that helps you with this quest by providing buffs for getting damaged, especially by 4 mobs at a time. No +25% Damage or Dodge chance for you!

Don't get me wrong, its a great zone, but this is the kind of thing we need playtested by more than PvE Tank players. It's the beginning of the expansion and questing is a requirement for World Quests. This one in particular? I dont know. But this quest is just insanely dumb. If you want some REALLY easy honorable kills to grind, THIS is the spot. Don't tell anyone I told you this. Keep in mind this is from the perspective of a leather class based around dots.

inb4 4 patches from now; "wtf I did this easy at a ilvl 500"

Well I guess I found a solution for the bug, that the purge isn't working sometimes. One of these mob groups have a mob called Choking Horror who suicide with an explosion. When he explode it doesn't count the purge, if you stun him while casting and kill him yourself it counts. I tested it on 3 grottos and it worked on all 3 of them.

You have to investigate and clear four caves:

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• Dark Grotto's entrance can be found at 80.5 56.5 spot, at the shore.
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• Bleak Sepulcher is further the east road, coordinates are 83.7 54.0.
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• Moldering Foyer is located at another shore, 80.8 51.0 spot.
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• Crumbling Chambers is located at east shore, coordinates are 86.5 52.1.
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TomTom:
/way Stormsong Valley 80.5 56.5 Dark Grotto
/way Stormsong Valley 83.7 54.0 Bleak Sepulcher
/way Stormsong Valley 80.8 51.0 Moldering Foyer
/way Stormsong Valley 86.5 52.1 Crumbling Chambers

Flush Them Out - www.youtube.com/watch?v=1U6sxKR_q-U