First, your class balance is a trash!
second, your arena is full of bugs, as a sorc, I can blink half way and get grabbed midair, not to mention so many striker and titan now tries to grab people out of arena area so they get free win.
third, your enhancement success rate is a scam. period, it is a scam.
forth, your shakatu shop rate is also a scam, after you implemented mystical rate up, my mystical rate fall down significantly. I used to have one orange per 15k, after that one orange per 50k coin spent. This is based on data from millions of goin coin spent.
fifth, some skills works totally different from what it should be in korean server. Not data wise, but mechanic wise. for example, some invincible skills just don't have the same invincibility as they are in korean. Sorc's Dark Shift can be interupt half way on midair. It should be invincible until I land, but there is multiple times I get glitched back to where I was before I used skill, and skill also goes on cool down. I don't know how bad your programmer have to be to not be able to COPY code from korean server.
you don't fix your bug, you balance is trash, your rate is scam, you treat your players like pigs in a pig farm, NICE. So, VERY, NICE.
Frustrated and disappointed on how you treat archmage class. Talk about balance class but archmage is too behind. Just delete the class if your not going to fix it. Did you ever consider how stressful it is for mage user to deal with other class especially in arena.