Post by skribs
Frost Aura is a flat 80 resistance to all. Paladin auras are 130 resistance to 1 type. Judging by the fact that resistance buffs dont stack*, my guess is that if you have frost aura up, and a paladin (or hunter or shaman with aspect of the wild or a totem of <school> resistance) has a resistance aura up (let's say frost resistance) then everyone will get 130 frost resistance, 80 nature resist, 80 shadow resist, 80 fire resist, and 80 arcane resist.
It also probably won't stack with Mark of the Wild, which at 2/2 improved gives 75.6 resist all (probably 75 or 76).
*From
http://www.wowwiki.com/Resistance StackingThe following list contains sources of resistance and stacking information:
* Racial bonuses always count
* Self buffs, such as Demon Armor or Mage Armor do stack independently of other bonuses
* Equipped items and enchants stack freely
* Only one Elixir or Flask providing resistance can be in effect at a time
* Auras, totems, and buffs do not stack - the highest single effect of this type applies. Also Magic Resistance Potion do not stack with auras, totems and buffs.