The only thing we know is accurate is info that can be collected with sniffers like items, zone points, and most NPC info. Spell lists are definitely not something we can collect, so it all has to be done manually. There is a high chance that many NPCs either don't have a spell list at all when they should or that their spell list is not fully accurate. Generally, they try to do things as accurate as possible, but there is only so accurate you can get without spending a ton of time playing live and collecting data manually by hand, or having a photographic memory
