why that Archdeava manastone failed

AM help i already put a <Greater Supplements (Mythic)> but it it failed they failed 2x that's why i need help i dont want to failed it again 500 is creddits is hard to find ( HELP please

 

I feel sorry for what happen, it doesn't mean that you put mythic supplement, it won't fail anymore it is just increase the chance of it to success. I forgot the percentage of socketing it with supplement that is mentioned by @cocosul, but here it is maybe
Without supplment - 70%-80%
With supplement - 90%-95%
It happen to us all, it always depends on your luck. Here is my tips, one of the thing I did when I socket manastone or enchanting gear is roll the dice and whenever I get higher than 70, I ups it. There is no way you could get those manastone back. I suggest that, do it when there is not much people around, also try to do it in different maps where is not much crowded players.
I don't know if rolling the dice helps to increase the chance, but it gives me more hope that it will success when it get bigger number.

 

Supplements doesn't guarantee 100% success but it will increases the success rate significantly.

 

i was on beluslan while doing it anyway thanks for the tips

so it cant be refundable?

 

No.