Mystery shop analyis

I collected some data about Wartune's new Mystery Shop, and I was thinking what is the best buy strategy. I will share what I found, feel free to comment! 

The first thing is, you shouldn't spend real balen in this shop, use only bound balens. Let's hope you stacked up a few tens of thousands from dimensions, because it seems you are not getting more. The bound balen producing dimension mines are seemingly non-existent.



Here is the list of useful items so far:

You can buy the same item for different prices: pure balen (or bound balen), bb + kyanite or daru, and bb + mystery stones.
The item is always the cheapest in bb terms when you use mystery stones, and its always the most expensive when you dont spend an additional resource.

As you see, all gems (divinity souls, eudaemon diamonds, normal gems, and resist crystals) can be purchased. Will crystals seem to be more rare than the others, but the rest is pretty common. 

What catched my eye that whoever made these prices, was not aware that Wartune has regular gem events, where you can create higher level gems and get extra gems. As you see, a lvl 2 eudaemon diamond costs 20 bb and 1 mystery stone, while a lvl 3 cost 90 bb and 4 mystery stone. However, when you combine 4 lvl 2 eudaemon diamonds (during an unlimited event), you get an extra lvl 3. So effectively, if they sell a lvl 2 for 20 bb, a lvl 3 should cost max 40 bb. (but 2 lvl 2 is still better because if you combine them during an event, you will get chests).
The same is true for everything: the higher level a gem, the more expensive. So in general, you should buy only the lowest level gems (I marked them with dark green). Since there is no reward for making lvl 2 divinity soul or lvl 2 resist crystal, in those categories the lvl 3 is a good buy as well.

Please note that I recommend buying even the lvl 5 will crystal. Although in general will crystals are much more expensive than resist crystal, here you can buy them cheaper. Additionally, will crystals are more rare. So I think it's okay to buy even higher level will crystals if you can afford.

About the miscellaneous items: so far I found 2 which I find exceptionally great deal, marked them bright green. These are beads of influence and vulcan hammer. These are "must buy" items.
Eternal heart is good too, especially since its less common now in dimensions (although you can find it still). The gift of god I find overpriced. Mahra, mount whip and mystery stones are useful items, but you can find them in large quantities for free, I wouldn't waste bound balen on them.

Please note also something very important: you are limited to 3 buys per day! For this reason, I recommend buying dark green items only if you have at least 1 purchase attempts remaining afterwards, or if this is the last shop refresh before you log out - to make sure you can also buy the top items if they come up.

I'm pretty sure that even if you buy only dark green items, you will buy the 3 items most days (if you check the shop every 4 hours), So you will spend about 200-300 bound balens, and about 10 mystery stones each day. If you have 20k bound balens like me, this will be enough for 2-3 months for sure. If you have a LOT more, like 50-100k, you might consider buying lvl 4 gems too, but don't forget, those will be suboptimal purchases.

Lastly, I would like to mention that there are other items in the shop, but they are really, completely utter junk. Here is the list of them. The sylphs could be useful to some beginner players - if they weren't so expensive.

There are really a lot of items, so I'm sure my list is not complete. I didn't see empire truncheon for example, but I hope it exists :)

Mystery shop would be an okay change after wild shop - if they didn't remove bound balens from dimensions.

*** UPDATE 03/08 ***

I updated the above tables. Advanced mahra and sepulcrum is highly recommended items too. I moved vulcan stove from junk to recommended for the following reason:
Now you can get vulcan's hammers 200-600 per week from Narrenda. And you get only 200-600 stoves, where you would need 600-1800. Yes you have some saved up from AB, but that will run out quick... You will need the stoves :)