5x shaman boxing, what weapons/talents?

I am boxing 5 shamans and right now I am at level 42 and I am at a loss as to what spec I should be going. Should I go for dual wielding? 1h + shield? just a 2 hander? I've been using 1hander + shield for quite a while and it seems alright but dual wielding looks tempting.

Weapons: 1h + shield. All the way! 2 handers have very little advantage with 5 shamans, casting dps will always be better then melee dps. Don't bother meleeing.

Talents: Go full elemental until you got 5/5 LO and Totem of Wrath. Drop the rest in resto. At 70, go either NS for pvp or ToW for pve.

Hope that's clear enough. :)

Thank you very much :)