Aspect of the Wild vs Nature Resistance Totem

Given a 25 man with at least 2 shaman, as well as Frost DK, and a hunter, is there any reason to use Aspect of the Wild instead of nature resist totem?One shaman can drop wrath of air, DK covers melee haste with improved icy talons, and the other shaman is free to drop nature resist totem. Is there any other air totem worth dropping once those buffs are covered?Is there any particular reason your raid prefers to have a hunter do it rather than a shaman?