Sam, you"re like a guy that decides to sail around the world in a rowboat. You are oblivious to advice, warnings, and general maritime practices. You have no preparation, no research done beforehand, you just sail away into the sunset convinced that everything will be a-ok, while everyone else /facepalms and predicts your outcome. (a horrible analogy, I know, but it"s early and I haven"t had my coffee)
In regards to raid XP...why? Just so you can play all of your toons at the same time? Why don"t you just run your individual groups to individual camps, set up macros to /target /nuke etc, and let each group of 5 have their own spot of mobs? IMO, that would be a hell of a lot easier than trying to either run 5 concurrent 5-mans (easier mobs/respawn) or trying to run raids at your low level. Surely 5 shamans should be able to one-shot, or nearly one shot, most world spawns?
I"m sure you"ll spend a disproportionate amount of time and effort telling me why this is a so much worse idea than trying to raid ZG at your level, but whatever.
But don"t ever stop Sam.