There are some real class balancing issues in Aion . The following information was posted by Jehuty , please read it on ...
1. High Level Rangers have not enough DPS overall. If you have luck you can place an acceptable amount of damage on your target. But just if you have luck. If not you will do lesser damage then any other class in this game. The random factor is not balanced aswell.
2. High Level Clerics are almost unbeatable and godlike. They don't care about 10 ppl hitting them. Every other class would be dead in 10 seconds, Clericsstill have full HP. Especally in "Gate Caming" Situations Clerics are overpowered. They have incredible tanking abilities because of their instant heals and they do a lot of DPS too !
3. The Templar need more snare and stun skills for mass pvp situations. the most of his skills are only available if he/she becomes hitten.so you need more aion kina !But because nobody will hit a Tank in a mass pvp (not until there is any other target available) the templar is not able to activate his best skills. So until this is fixed, the Templar ist just a "Pulling Machine" in PvP. 4. The Sorcerer have a greater Skill range then the other ranged class - the ranger. why ? they do a lot more DPS anyway why they need more range then too ? But byside this factor, the DPS/Tanking ratio is ok.