Mistake is 100% right. Using all HQ mats takes away a lot of the exp you get for actually crafting the item(though if youre turning it in then the reward doubling should make up for that). With that said, high quality skins and such arent really all that hard to get for most of your leveling up process. Lets say you were making aldgoat leather products to turn in. Part of that process would be curing aldgoat skins(with alumen you can mine up) into aldgoat leather. You are right that most aldgoats dont drop high quality skins when killed. But the sheer volume of people killing them leads to the prices for many of these skins(or sinews, or whatever other drop you might need) being incredibly low on the market board. And another thing you can take advantage of is cross-class skills. If you have most of the classes leveled up already then you have some powerful tools you can assign to the LTW kit to help you out. And finally, if struggling you can always use your other skills(weaver, blacksmith, goldsmith) to make sure you have the best equipment available while working on LTW.