What class is better in aion Templar or assassin

Aion is known for it's balance of classes. There is no "better" class. All of them have their strengths, all of them have their weaknesses, and all of them have their opposites. It all depends on your playstyle. A templar is the tank of the game. It focuses mainly on HP and Physical Defense. A templar can't dish out as much damage as say, a gladiator or sorcerer, however it can withstand great amounts of damage utilizing the shield, and special plate armor. In pvp, it is very difficult to kill a templar quickly, however they don't kill things as quickly as other classes either. The assassin is one of the two scrapper-ish classes of the game. The assassin focuses mainly on Evasion and Physical Critical Hit. They specialize in attacking from hidden positions and utilizing daggers or swords by hitting vital spots on an enemy to cause further damage and to critical hit. They are quick and agile and are usually one of the main sources of damage dealing in a group. They can only wear Leather or Cloth armor, however you will mainly want to stick with leather for the good mix of Physical Defense and Evasion. In pvp, assassins are known for striking enemies down quickly, however they cannot withstand as much damage as the other melee classes so they must rely on their evasion skills to dodge incoming attacks. If you like to dish out melee damage and focus mainly on critical hitting, and not having to worry about tanking, then the assassin is for you. I suggest trying them both out and seeing which you like better!