Okay, I got the achieve. Here's some pointers: you have to destroy 10 weak points, not just shoot them (they each have health bars)there are two chances to shoot his weak points, one in Melandru's realm and the other Grenth'stakes about 3 shots to destroy each oneonly shoot ones that are slightly ahead of Aurene to give you enough time to destroy oneyou will not be able to shoot any weak points behind Aurene if you see a prompt about line of sight, move on to the next weak pointmuch easier to accomplish if you have at least one other person with youyou will get the achievement about 15 seconds after you accomplish it, when Kralk teleports to the next area, not immediately so don't leave the instance until you get it