Okay so let’s do this:
You can add information about any item in the game (e.g. a piece of gear, a creature, an ingredient, a potion, a fish, etc.). Its entry can contain lore-related information about it but no strategy information.
Monster Example: “Wyvern”, make a note of the fact that they are attracted to fire and are known to occupy the ever-burning forest known as the Wenderwood. But you wouldn’t put in there “Has a DoT effect that happens every 3rd attack”.
Gear Example: “Sword of 1000 Truths”, Ancient sword given to the one who will defeat the great evil. +12 Attack, +2 Magical Defense. Acquired via the quest “Search for Truth.” But you wouldn’t put "Here is a 20-step guide on how to complete the quest ‘Search for Truth.’
Item Example: “Greater Healing Potion”, “Heals the imbiber to full health instantly.” I’m not sure if you’d put the required ingredients or not because I haven’t designed the Alchemy profession enough yet to know how the recipes are discovered. But if it’s something where the recipes are obvious and given to you in-game right away, then they would be fine to put on the Wiki. If it’s something where the recipe has to be ‘discovered’ then you wouldn’t include it.
Class Example: “Runemage”. You could include lore about how the Runemage casts spells using the Words of Power. You could include basic information about how to play a Runemage (e.g. “Press the trigger, draw, cast”). And I think it would even be fine to include all the publicly-disclosed spells that we’ve already talked about because those are spells you’re just going to be taught by the game anyway as part of the class (e.g. it’s no big secret how to cast Fireball). However, there might be other spells that are fun cantrips that let you for example cast Fireworks into the sky, and those are something that you discover on your own by reading a rock in a certain area of the world. That would be something not to include.
It’s a totally fuzzy line. I’m not really sure how to make it much sharper. I guess the best thing to say is “Anything lore-wise is great, and anything that’s a generally-known fact that you would be told during an in-game tutorial is fine, but anything that is like a strategy for beating a monster, or hidden gameplay you have to discover on your own, would not be included.” Let me know what you think.