I'm an avid wiki editor that tends to just dive in, but there's already a lot of work going on and I don't want to mess anything up. So instead I will offer some suggestions that I would appreciate feedback on before I get started.
1. Gear pages. These are already going well, but we can increase the benefits of these pages through the use of the Tabber extension (already on the wiki). This would allow for doubling (or more) of the infoboxes while only displaying one at a time, which is beneficial for the weapons that have multiple rarities and damage values. As a side note, it's also possible to make the infobox color change depending on the rarity displayed.
2. Infoboxes. Good start on these, but I would seriously suggest layered templates (eg. templates within templates). This lets you make mucho template goodness for each section and when you combine them it makes it easier to change one section. Instead of searching through the very, very long strings of wikitext, you can just pick the section. It's also very beneficial when creating a page template that will use all of the same formatting etc. as is displayed on every other page for consistency. If you would like me to go into greater detail about this, please ask!
2a. Categories. Fandom doesn't require as much care when it comes to categories as Gamepedia, but its still possible for people to put in the wrong categories or forget entirely. Human error and all that. To remove that entirely, you can add built-in category addition to a template so it'll do all the work for you! Kinda the greatest thing ever tbh.
3. Challenges. I'd like to get these set up, but in my own opinion each challenge should really have it's own page. However, some of the challenge names overlap with other things (take the Critical Expeditions for example) so I was thinking that either each challenge should have `(Challenge)` after the name to diferentiate, or just after the ones that are duplicates.
4. DPL Extension. I'm not super great with this yet, but for a wiki that's likely to become HUGE it's probably your best bet. What this extension does is pull information from other pages based on various page info (like categories, templates used, etc) and display it on other pages. AKA, you type a few lines of code and it'll generate massive lists in various formats that you can setup yourself. Want to display all Masterwork Storm components on a page? Sure, you can type it all out by hand, but this will do it for you AND update itself automatically when more is added. Very helpful, and means you don't need to constantly update and add info to pages.
Sidenote: don't put redirects into categories ;) they don't need categories but will still show up in the category and that can cause confusion, especially if the category is the destination page. I noticed on the Category:Masterwork that it's displaying its 2 redirect pages there.