Trick to Preposterous Priorities achievement (The Dread Cellar)?

allochthons

My dungeon group has been working on the Preposterous Priorities achievement in vet Dread Cellar. We can't get it. The text for the achievement is:

Defeat the Scorion Broodlord after destroying 4 Agonymium Stones while no Xivilai are alive when each stone is defeated in Veteran Dread Cellar.

We've tried killing all the adds as soon as they spawn, making sure they're dead before hitting the Agonymium Stones. Usually the adds go down before the Agonymium Stones even spawn. Didn't work.
We've tried holding the adds alive until Scorion spawns the Agonymium Stones, and then killing the adds, then the stones. Making *absolutely sure* the adds are dead before we hit the stones. Didn't work.
We've tried tried both of the above while changing how we deal with the final add that spawn at about 10-15%. We've killed Scorion as soon as the fourth stone is killed and that last spawn doesn't even spawn. Didn't work.
We've tried keeping Scorion alive until that last add spawns, kill it, and then kill Scorion. Didn't work.

What is the trick?
(It doesn't have to be done on hard mode, does it?)

tomofhyrule

No, it's not HM. The thing that makes it tough is that you have to destroy the stone too, and that makes it a pretty intense DPS check. If the stone is destroyed because of the Scorion, it won't count as being destroyed by the players.

Pretty well it's: get rid of the Xivalai adds, and then nuke the stone as fast as you can. If you slow DPS when the Scorion is up, you can even get the one Xivalai down before the Scorion teleports to a stone, and then you only need to take one add down before focusing the stone.

If the Scorion does its big pull on everyone or the conal toward the tank is really intense, that means that it got the credit for the stone and you need to reset.

allochthons

That is excellent information, @tomofhyrule
Thank you very much.

We have pretty decent DPS, but yesterday we were only 3, 1 tank and 2 DPS. I wonder if there's something in the Crutchalerts add-on that lets us know if the stone was killed by us or Scorion. Since console only recently got add-ons, we're still learning how to best leverage them, and about their quirks. The tank and I (DPS, healer when necessary) do run crutchalerts.

Any other insights from others is very welcome as well.

Treeshka

If you see the boss being enraged. It starts to glow i believe, which means it consumed the stone.

allochthons

Treeshka wrote: »

If you see the boss being enraged. It starts to glow i believe, which means it consumed the stone.

Good to know! Thanks much.