Meow Ren.5382

If you're looking at just cost-per-salvage and have both kits, the Runecrafter's is cheaper per salvage. But it has a 5% LESS chance for rarer materials (the Crystalline Dust you want for selling). https://wiki.guildwars2.com/wiki/Salvage_kit

Gen 1 precursors (like Dusk) can only be crafted once because that crafting is tied to an Achievement that can't be repeated. Some of the crafting components of the Achievements can be re-crafted but you won't be able to craft a second Dusk. In that, your guildies are correct. However, Gen 1 precursors also drop randomly from foes and from throwing rares or exotics into the Mystic Forge. There are other sources which is also why other players talk about selling them on the TP. Unless you want to try your luck at flushing rares /exotics down the Toilet, your best bet if you've already crafted Dusk once is to save gold and buy it off the TP. After you have the precursor, the rest of the steps to make Twilight are the same as always. TLDR: you can only CRAFT a Gen 1 Precursor once, but can buy it off the TP as well. You can make as many Twilights as you want as long as you have a Precursor for each and the materials.

If you still need help with this, I have a character parked at the NSS goggles. You should be able to (carefully) hop down from there to the lower platforms and find the spot you need. In Central US timezone if that helps line things up better. :)

The Extra-Pungent Skyscale Treat is used on the fourth part of the Skyscale collections quests. It can be used while in the map for any of the "Troublesome Skyscales" achievement parts. You don't have to be IN the JP or even get to the end if you use a treat. It's meant as an alternative for folks who have difficulty with JPs and whatnot. If you have a treat and double-click consuming it doesn't work, check your achievements and make certain you don't already somehow have that part done. https://wiki.guildwars2.com/wiki/Troublesome_Skyscales Also make certain you've actually unlocked the "Troublesome Skyscales" achievement. You're meant to do them in order and it's possible to buy the treat off the TP without having the achievement unlocked. Full SKyscale acquisition process is also on the Wiki: https://wiki.guildwars2.com/wiki/Skyscale#Unlocking

Try right-clicking the items and look for the option to "Add to Novelties" or "Add to Wardrobe". They need to be unlocked/ added to the Wardrobe in order to be able to then add them to the Novelties slot on each of your characters. You'll know it worked because they should disappear from your inventory.

If you've completed all the other HP in Heart of Thorns or only have the difficult ones left (like Mushroom Queen) and have some WvW tokens you can buy a Notarized Scroll of Maguuma Heroics. The Scroll will give you a random HoT HP when consumed. https://wiki.guildwars2.com/wiki/Notarized_Scroll_of_Maguuma_Heroics

You can also track most of the core Tyria jumping puzzles through an Acheivement in your hero panel. It doesn't tell you exactly where on a map a JP is, but it gives a hint as to the map: https://wiki.guildwars2.com/wiki/Jumping_Puzzles