I am afraid to say economy is over unbalanced right now.
In justac's beginning, ashtal was ballanced. This was because ashtal was really harder to get, only by the ashtal's gift box, rich's stuff.
Now they, as scion stones, are normal like ring spirit stones. This made ashtal being nerfed, and now it doesn't worth to use, and so players go elemental build all the way.
Critical potentials are near dead. There's no longer reason to go as critical class, if elemental is better, this is sad, and disappointing.
Along with DoT rebalances this went unfair for low defense elemental classes, making them bad elemental classes now, and classes who were supposed to be for critical are even better than them.
Heroic armor is overrted now, nothing special, and cheap compared to before.
Solution may be re adjusting the stats of the stones, and skills, or getting new content, until then, the content you're using for now, will stay as the same, and elemental builds will keep ruling. Kind of bored.