That game has great team tactics. The mobs respond differently as the game gets harded (higher lvl). They start off with a simple circle of agro that you can pull a few or many with a archer. Later on it becomes more difficult to pull only one. Sometimes they run away and if you chase more of their friends will join the fight. Of course none of this would be fun if the controls for your team (you can have up to eight characters at once in single player) weren't so easy to use. There are many different combinations of movement behavior and attack behavior that you can choose for the team.