Mage

Dalaran, kingdom of the magic, once is the melting-pot of the Mages. This mysterious art was diffused to the far corner of the world after the destruction of their homeland by the Burning Legion.
Mage is a very significant and helpful member of the group. They have a powerful spell which is called Polymorph can limit the number of the attacked monsters. The Mage can also travel across the world in an instant by opening arcane portals to distant lands. They can even summon food or drink to restore their friends from the combat.

Information
Allowable Races: Human, Gnome, Undead, Troll, Blood Elf, Dreanei
Standard Bars: Health/Mana
Allowable Equipment: Cloth
Allowable Weapons: Staves, Wands, Daggers (with training), Swords (with training)

Characteristic
When seeking someone to introduce monsters to a world of pain, the Mage is a good choice. With their elemental and arcane attacks, it's a safe bet something they can do won't be resisted by your chosen enemy. Damage is the name of the Mage game, and they do it well. Their arsenal includes some powerful crowd control spells; also, giving them the ability to keep hordes at bay -- in fact, these abilities can be used on the most common creatures in the game, thus making them extremely valuable for this purpose.

Challenges
1. Staying alive
2. Managing Monster Hate

Strengths
1. Very effective in damaging multiple targets at once with powerful Area of Effect Damage Spells
2. Effective at escaping enemies with Blink, Frost Nova, and Ice Armor spells
3. Excellent long range damage capability
4. Can transport self and others to major cities using portals
5. Great at crowd control

Weaknesses
1. Restricted to wearing cloth armor
2. Poor melee capability and low hit points
3. Has no healing ability

Profession Options
You can pick whatever you want. You might find these more tailored to the mage:
Tailoring - Tailors can create Cloth armor for themselves or sell it to others.
Enchanting - Enchanters can enchant their equipment to make themselves more powerful
Herbalism and Alchemy - They can create buff potions or mana potions.