User blog:Tricoro/Crystal Treasure Upgrade Efficiency

One way to add more crystals in your arsenal is to build a Crystal Engine. It is done by collecting as much crystal-generating treasure as you can in your treasure slot. You may have lots of them already, such as the Big Crystal Ore or Lv.50 Golden Club Trophy. But if you don't know which one is best for you to upgrade to maximize the crystals per day, this is the right place.

Back on May, our good contributor, Pgrobban, added average # of crystals per day on +9 in the Crystal page. This is interesting, since I did not notice this before. The amount of crystals on average are as follows. Let's take Prophet Cookie's Majestic Beard, for example.

At +9, it will give us 30% chance that we might get 2 Crystals. You can get the amount of crystals per day on average to be:

0.6 crystals per day. Since this is a chance (RNG), there may be a possibility that you can be lucky or unlucky by getting more or less times you earn that 2. But to take this into consideration, we have to assume that the chance is equally distributed. Let's say, every 10 days, you will receive 2 three times, and it was repeated the next 10 days, and so on.

Let's call this the crystal-chance ratio.

Now, within each upgrade, you can see that you can increase the crystal-chance ratio so that it gives you more. Of course, the best upgrade would be the upgrade that increase the ratio more than the others. Which means an upgrade that increase the ratio from 0.3 to 0.7 is a more effective upgrade than increasing from 0.3 to 0.5, for example.

If you understand, then good. Calculating all crystal-generating treasure crystal-chance ratio for both +0 and +9 shows how effective your upgrades could be. Here is the list, sorting from the best to the worst worthy of upgrading.

Note that I have already put this in Beginner's Guide to Cookie Run and Crystal Engine.

The number with the highest margin (ratio at +9 minus +0) would be the top priority for players to upgrade.

I hope this is beneficial and clears off the doubts for all people out there who have a dilemma of which one to upgrade. Keep running, Cookie Runners!