I spec'd my four pets for Fire Resistance and dropped a Fire Resistance totem and still got my but kicked on my first and second attempt. I logged onto my Alchemist, created 5 Major Fire Protection potions and kicked Nazan's ass without a single death (pet or party member). There's always a way, you just have to think outside of the box sometimes. I just wouldn't reccommend farming Nazan using potions. It can get pretty expensive.