17 400 coupons used at this Lucky wheel and i think there is little bit low fragments chance... last time i saw topic with 25 000 coupons and there was about 10+ fragments i think it was Naruto Ronin...

I think still its good event for Refine runes and good amount of Potions

After 500 Spins 10 000 coupons

Another 370 spins 7400 coupons (i was doing Minato edo...)