Vision Story Achievements

I'm having a hard time finding people to do the Salt on the Wound achievement for Vision/Dragonfall Mastery. Is there anyone out there who would like to group up for it? I'm on most evenings (EST). Just whisper me: swordoflorn.9687

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's
• takes about 3 shots to destroy each one
• only shoot ones that are slightly ahead of Aurene to give you enough time to destroy one
• you 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 point
• much easier to accomplish if you have at least one other person with you
• you 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

If you don't mind doing WvW the reward track gives you the boots as well. The only bit of vision that doesn't work for is Jahai, because the story mastery is a requirement for purchasing the item.