Board Thread:Questions and Answers/@comment-64.233.173.223-20150328005721/@comment-24956068-20150328161443

1. There are no problems if you're going to be a certain collector, that's normal and I found unique collectors like you in almost every game! However, that kind of collection comes with a pain that you must consistently expanding your treasure slots for 30 Crystals (at least it's no longer 100). You can even use free Crystals for that expansion (as events are coming and going). I think if you can supply yourself with some small purchases, it will be fine as you can use Crystals you buy for another purposes.

If at one time you feel that you need to stop collecting, my recommendation is evolving them first before extracting into magic powder. Low grade treasures have benefits: they are often using low grade ingredients (but some are using S/SS grade, I think don't evolve this treasure, just immediately sell it), they have lower evolve price, and they have better chance of success with coins. After evolving you can extract them for getting more magic powders, better than extracting the treasures and ingredients separately.

2. For treasures that are changing their grade when evolve: Treasures will maintain the evolve cost and success chance with the original treasure's grade, but when evolved, the upgrade cost will change following the evolved treasure's grade. So, I usually recommend people to upgrade first before evolving except it's from the same grade. Evolving will retain the upgrade level and even if evolving fails, the treasure and its ingredient would not lost.