https://wiki.guildwars2.com/wiki/The_End#Achievements
Zitat
Note: All participating party members will unlock the achievement on success.
ZitatAs of late 2020 a bug causes Aurene's attacks to not fire directly at the selected Weak Point and thus miss during the first half of each attack phase. However, it also allows her to fire behind herself so long as the camera is angled behind her. Additionally, another bug allows the achievement to be acquired without hitting different Weak Points and instead only needing to land enough total hits on each body part (body, left wing, right wing). While these bugs persists, in order to get the achievement it is recommended to select a single Weak Point and keep the camera pointed at it while continuously spamming
Dragon's Fury. Ignore the misses being reported. Halfway into the phase they will turn into damage numbers not associated with any specific Weak Point. The achievement will be reported as soon as the player exits the portal into the Fissure of Woe.
Scheint ein paar Bugs zu geben.