Talk:Crystal Alchemy Store/@comment-5206138-20120816205107/@comment-5417121-20120817005200

You can do three 20-hour recipes and four 9-hour recipes in 96 hours, which would make you a total of 10 crystals every 4 days, assuming you're never late starting a recipe. You can arrange those recipes however you need to, to avoid having a recipe finish in the middle of your sleep schedule. Basic rule of thumb is, do a 9-hour recipe, but if you're going to be sleeping in 9 hours, then do a 20-hour recipe.