For a level 6 rogue you should buy the Novice Rogue set and the Novice Bladedancer set. Use the swords from the Bladedancer set and the Armour from the Rogue set. As a rogue you will need to put Runes of Fortitude wherever you can. For your amulet and rings use Ice Queen's small Amulet and Rings. These are good because they grant a 5% strength boost. Your skill points should all be spent on "Merciless Strike". After you have done this you should keep going to the arena until you have about 1500 arena points. With these buy the boots, gloves and belt from the arena supplier. Amplify your gear to +6 and higher and you will do well in the arena.
Here are some other good classes for level 6- Bladedancer, Ranger, Warlock, Deathknight, Paladin, Priest, and when amplified high, Mage.
Hope that helps. :good: