I did arenas with my shamans because I needed some starter arena gear and was too lazy to farm BGs.

Basically I was unable to survive in 2 v 2 and 3 v3.
5 vs 5 was another story.

In 5 vs 5 with 5 elemental shamans I usually was able to drop one or two from the other team before they even were able to react. After that it is just an easy ride.

Of course, I have got my fair share of loses, but most of them were funny in some way. Once got swarmed by 5 frost mages with water elemental and that mage clone spell... I just stayed there and healed myself until they killed me. Was so amazed by the lots of frostbolts flying around that I forgot to fight back