The bulk of playing any MMORPG is spent killing monsters to level up, gather items and complete quests. So it should be noted very early on what you can and can’t kill from an early level. The last thing you want to do is waste thousands of Kinah in soul reviving for experience. It’s too expensive and could cost you travel expenses to an area you really need to go.
The colour of enemies names will change colour to give you an idea if they are safe to attack or not, depending on your level. These colours are white for very safe, yellow for safe, a dark orange for a challenge and red for dangerous.
There are also elite mobs that can be the same level as you but are too tough to beat alone. This is indicated by the style of the frame that holds the monsters name once selected.
This shows a normal mob frame, one that can be tackled at at your level. The frame is pretty basic so you can easily solo it at the same level or even 1-3 below.
This frame is larger in size and more intricate design. You will notice this time it has two stubs at the end and also 2 more starts in the circle. This means the mob is an elite mob and would require a team of 2-4 to kill it efficiently.
A hero mob will have a name frame like this one. Hero mobs are obviously a lot tougher than normal monsters and would require 2 groups (12 players) to alliance and defeat it.
Legendary Mobs have this frame and are obviously the toughest kind of monsters. Legendary mobs are usually bosses and require a legion (around 24 players) to defeat it.
Hopefully this would of given you a better idea of what to attack and not to attack when venturing around in Aion. I made the simple mistake of attacking an elite mob when I reached level 15 (Krall) and it was a very shocked experience indeed.