hmm I've been wondering about a 5 druid setup myself and strangely I would not go boomkin :S I know not having armour on a casting druid is near suicide, but if you pre-empt healing with lifebloom and rejuv you should be able to make up for this. lifebloom on its own would tick for 120x5 (with crappy gear) and then 360x5 with 3 stacks that a wopping ~1500hps.. throw on another hot and i'd like to see them take those toons down :P in the mean time pewpewpew

a good Idea to start off with would be to all be in stealth, and set a different focus for each one of your druids.. then when they are all set start with a starfire on some poor defenceless player and then root all the focuses.. that way you should be able to limit your damage a little, don't forget to use cyclone too.. you could theoretically have all 5 opponents in a root, cyclone CC rotation. If you do manage to pull this off.. don't forget to time your Starfire+wrath+moonfire damage combo just as cyclone wears off. with 5 starfires i'd imagine a warrior would just about survive that.. or an SL/SL lock.

there is then the problem of choosing spells.. moonfire is an easy one, instant no risk of school shutdown. your hots again great.. might even be good to drop regrowth (with so many instant hots :S), Insect swarm again a great one.. can cast it on all the opponents.

the problems begins here tho.. which do you choose as your main damage spell.. Starfire pack a punch but is soo slow.. 3 seconds when you have no way of protecting yourself from interruptions (except barkskin) is very risky.. on the other hand.. 1.5 seconds casts on wrath means you can be like a shammy team and become a gattling cannon.. however unlike 5 shammies you would run into a problem.. 5 grounding totems means at the start at least they have a chance to not being CSd or such like, as a 5 druid team you can with guarantee assume that one of you bunch will be out of action at the very start
so if you cast wrath .. you run the risk of nature shut down.. if you use starfire .. so slow.. and leaves you without cyclone etc

It will be very hard to go very far though.. a fear thrown into your little group and you are quite screwed.. unless you set them up standing away from each other (5 sided ring)
personally I would only rly use them as a fun BG running team the amount of frustration you would cause on the opposition would make up for the unsuccessful arena matches

I do hope someone does well with this setup <3 druids

Oh and @ Eteocles

Issue 4: Shamen have 3 trees of spells; one gets locked you've still got options.
screenshot or it didn't happen!! :P