Boxing multiple toons, I'd level them Elemental.

Something like: http://www.wowhead.com/?talent#hEz0q...zqo0gRco:pbZMc

You'll want the Improved Ghost Wolf, in Enhancement early.
And you'll want Call of Flames 3/3 + Lava Flows 3/3, by 75th when you get Lava Burst.

As your gear improves, you might not need 3% hit from Elemental Precision or the mana efficiency/regeneration from Convection + Unrelenting Storm.

But that's a decent leveling path for talents.





Once you have Totem of Wrath, glyph them all with it.
Drop 1x ToW each, every 5 minutes for a substantial spell power boost.

You'll also want to glyph Lava Burst, as soon as you get it.

I'd have one shammy with the (minor) glyph for reagent free Water Breathing, and another with reagent free Water Walking.