Hi,
no comment, just tell my experience today...
I needed to plus two daggers... The first one needed to rise from 17 to 20 and the second 16 to 20.
First I bought five jewels (promo 400 each). The two daggers rised to 19...
After that I bought jewels one by one... And it was a long and desesperate 19-18-19-18-19-18...
The final result ?
24 jewels bought, 14 succeed, 10 failed, 9 minus 1, 1 zero...
For 9600 diamonds (more than 200 euros) I got 1 dagger which rose from 17 to 20 and the another from 16 to 18...
It should have been done with 7 jewels...