Before you pull the Poacher, make sure you have a beast skull in your bags. These drop from other beasts in the zone.
Aggro whisperlings and drag them to desecrated beasts. When the beasts give a blue message about looking skyward for whisperlings, kill the whisperling. Repeat until the Poacher spawns. You will receive a pink message 'A foul wind blows through the forest; a warning to its fauna that death is near!'.
Fight The Poached Poacher on top of the new non-aggro beasts you spawned. [edit: I instead ran to one of the now sacred animals, clicked it, and ran back to the Poacher. This worked much better than trying to move the Poacher around as he fights at range.]
At 49% the Poacher becomes invulnerable. Click on one of the non-aggro beasts from step 1 and offer it a beast skull by clicking on it to make the Poacher killable.
Hunt a divine badger ( -296, 98, 215 ) Copy/waypoint -296.13, 97.78, 214.92 for their focus shard.
Follow the ants to the ant hill ( -360, 104, 219 ) Copy/waypoint -359.98, 103.64, 219.22 and click the hill to enter.
Slay Thraxinae ( -177, -400, -401 ) Copy/waypoint -177, -400, -401 on the ceiling of the room.
It may seem like she is not at her spawn point. Look up or use a target command.
At times, disappears and spawns adds. Kill the adds, kill the named. Rinse, repeat.
Though a quest may complete at this point you are not done.
Apply spiritual focus to mustelidae ward totem ( -373, -344, -282 ) Copy/waypoint -372.88, -343.61, -282.15 inside the ant caves.
Return to Haadirr Darjin.
Notes[]
To finish the zone and spawn an exit portal (not necessary for quest, but it is the last named in the zone): take the tunnel to the left at the mustelidae ward totem to kill the named Vampyre duo. One will go invulnerable at various times. Kill the vampiric orbs around the room to remove invulnerability, kill the named. Do not cure the detriment before the named changes back to original form. Repeat for other named.
Edit: when one of them turns bestial, Look for the orb emitting red aura to it, and kill that orb to change him back* repeat.