Well there will be a LOT of outsiders, and a lot of lawful, chaotic, evil, and good subtype stuff being thrown about in this campaign.
So essentially what I'm being told is: from levels 1 through 9 you get Resist 1-9 against good/chaotic/lawful/evil subtype damage and spells, but at 10th level you gain immunity. This on top of the fire immunity. So, from 10th level and higher, you're essentially immune to all fire as well as spells like Blasphemy, Holy Word, Holy Smite, Unholy Blight, Order's Wrath, Chaos Hammer, Holy and Unholy Aura, the holy and unholy weapon property, and all spells changed with metamagic feats that make them good/chaotic/evil/lawful.
Celestials, demons, and devils don't necessarily do good or evil damage with their natural attacks. That's more so getting passed DR so I can probably ignore that.