The shaman is one of the most complex class in Warcraft universe.Before Burning Crusade expansion,the shaman was seen as the paladin of the horde.Once with the Burning Crusade expansion,the shaman class became available for the Alliance too.

The Shaman,in Burning Crusade expansion became a good healer,a good off tank and very good in pvp.

The Enhancement tree made the Shaman a good fighter in pvp.It’s so good because of his totems and ability to deal a great amount of damage in a short period of time.Withe improved ghost wolf and Earthbind totem the Shaman can easily escape from hard situasion.His armor value is big enough to defeat all mele classes.His spells are powerful enough to destroy casters.The Shaman,to say so,is good for anything.Can heal,reincarnate,deal a large amount of mele or spell  damage in a shor period of time.

Here are the best talent builds.

Elemental tree is for pve/leveling/pvp and raids.It’s very easy to use this spec because you deal high damage while keeping your enemy away.

This talent it’s very good for battlegrounds becouse,using the protection of other players,your chain lightning spell can do a lot of damage among the enemies.

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The Enhancement tree is for PVP and raids.It can be used for pve too,but the offensive abilities will be useful at lvl 30+.While using this spec the shaman deals more damage than a warrior.

In pvp this spec makes the shaman a formidable oponent.

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The restoration talent build is only for raids or battlegrounds.It gives a high amount of healing but has few offensive abilities.