[SUGGESTION] Codex / Bestiary - How to
I like this idea, maybe not specifically for soloing difficult bosses but it would certainly be a nice resource to point folks to when they aren’t sure of the mechanics of a fight. There is usually someone in map chat that’s willing to explain big meta fights to players, but it’s up to people to ask for help first if they aren’t sure of what to do. Having said that, it’s disappointingly often that I see someone ask for help in map chat during a big meta fight like Vinewrath, only to have an angry player snap at them in frustration with a response like “learn the fight or GTFO, you should have asked before we started” etc. (Please, if you do this—I understand where you’re coming from, but keep in mind that perhaps that player just entered the map, or perhaps they’re new, or thought they could simply follow the zerg like you do in most other maps. Patience and understanding go a long way!)
I do like your idea of a Bestiary of sorts, and in a way we already have something like that for several fights/bosses, with all of their mechanics and best methods for defeating them laid out on their respective wiki pages. I don’t see why players couldn’t start contributing more of these to the wiki, though. It wouldn’t even really have to be limited to specific monsters in general—this same type of detailed explanation could be used to cover different events or metas. Ogre Wars, for example, is a meta that a lot of people don’t fully understand how to get started, or don’t fully understand how it can get “bugged,” by completing or not completing a certain event. Explaining things like this on the wiki would only further spread that information throughout the community.
tl;dr: +1 to this! But I don’t think it needs to be a separate website—put it on the wiki so players can contribute their findings!