I'm going to throw this out there for three Elemental Shaman. (also running resto shaman and prot pala)

(One Shaman has Totemic Wrath)
http://www.wowhead.com/talent#hGGhGRfkzGZbZbh

(Two Shaman have Nature's Guardian)
http://www.wowhead.com/talent#hGGhGRfk0GZbZbh0o

It is probably similar to some cookie cutter builds, but with slight alterations that I hope suit multiboxing said group.

I'm thinking the damage/magic reduction will help with things like AOE and loose mobs. I never see a need for Earthquake - plus I don't use mouse broadcasting.

The passive healing of the healing stream totems can be boosted in both healing others and received heals - so spark of life seems like a good one too.

Any thoughts?