Bought 40 of them, and only needed 2 levels and I would have been happy. How do you like your chances of getting 2/40? Dont bet on it. Wasted money and silver that takes alot of time to grind. There are tons of grinding as is, and plenty more characters and grinding in the future. There is no reason the rates are this bad for certain things. Consider upping the rates. It wouldnt hurt to be able to get 2/40 success on occasion

Force enhancement stones are pretty useless in this game and also a waste. I really dont get why they cost so much and are hard to get when 97% of the time you use them, it fails.

My only suggestion is lowering down the silver it cost to use force enhancement, if i used x10 Refined Crystals at 500k silver each try thats 5mil silvers. To me it looks like the success chance of x10 Crystals @ 30+ gear is 0.1%. 

 

Hopefully you guys do something about it.