I use Chain Lightning and Lightning Bolt a lot! As well as Fire Shocks. Thats just for starters. Your totems are your friends. As soon as you can do the quest in Sunken Temple for the Mana Totem, do it. Your going to find out that most players within 9 levels of your own level can be killed. The skulls ?? are the ones who will cause you the most grief. Once you get within their range then they wont be a problem for you. My group is presently 60/59/59/59/59 and I can PK most lvl 70s if I can get the jump on them. With the proper gear and lvl 70 PVP is going to be extremely fun lol.

oops...just saw your post on only 2 shamans? 2 vs 1 should not be a problem. Its just with having 5 you get that much more power shots. CL is a pretty potent spell cast.