Purified Gasha: Cost 19 Diamonds
1 x Purified Fusion Stone (Guaranteed)
1 x [10 transmuter charges]
2 x [10 transmuter charges]
5 x [10 transmuter charges]
And now that we get sales of 10 At charges for 5 diamonds (half a diamond/charge), that means even if, on average, you get a 10 At charge each time, you'd be losing 8 rubies for 5 diamonds, which, imo, is not that good of a deal.
But i guess I'll buy a couple of these with my spare dias and look at the fail rate.
Update: Bought 5 of the 19 diamond packs, and got 10 AT charges every time
Not the best sale, but not too horrible either. I guess I'll save my complaints for the next sale