The spiritmaster is based on the 4 elements of life: water, fire, earth and wind. Exactly like the sorcerer but there are some huge differences between the two classes.
The spiritmasters attacks mostly include DOTs (Damage over time) and also some nukes. Although their nukes aren’t that powerful as the sorcerer’s, the effect can still be seen.

A spiritmaster is a summoner, meaning that they usually have a kind of pet with them during battle.This class can only summon one of the 4 spirits at a time, depending on the combat type. Some spirits are based more on DPS (Damage per second) attacks, others are based much more on tanking. The player has to choose the right one between the creatures.

The spiritmaster relies on mp just like the sorcerer. This two classes consume a lot mp and money too, but the leveling is a lot quicker like this.

PVP/PVE
A skilled player which knows how to use the skills of the spiritmaster can beat most of the classes in aion. A stealthy assassin can easily kill a spiritmaster, because of the low defence that this class has. The spiritmasters wear cloth making it one of the most offensive classes. But with the help of a good pet this character can survive.
In PvE a spiritmaster has no problem killing mobs. Choosing the right pet does the whole job. And because of this fact their hp hardly decreases. They have good skills to give their pet extra hp and defence from the brutality of them being on the front line. The combination of pet and master is indeed very strong.

As for proffesions cooking and alchemy are essential. Cooking is very useful in making food which serves as a buffing mode. Alchemy can be used to make mp potions.And also a good player can earn some money this way.

The spiritmasters are a well balanced class. And neither positives outweigh the negatvies.