Stat gain for each class :
Below you will find what you gain from each stat.
Example on how to read : ATK is gained from STR and INT. A mage will gain 3 ATK for every point in STR and INT. So with 20 STR and 30 INT, you get 150 ATK
Right now , there is no other way.
And that means get end game set requires a HUGE amount of crystal and if game321 does not restore the ability to buy crystal for gold from other player, it will be very difficult for non-vip to get their hand on a full set.