I've put each mission of the arc in it's own entry in the mission namespace; can someone confirm I am doing this correctly (before I go much further)
I only took a quick glance, but it all seems to look OK mechanically. Anything else (categorization, etc.) can be easily tweaked if need be, so I'd say you're good to go there.
The arc starts off being called "The Anti-Matter Collision" but the briefing for Part Seven starts with "The Instant Army (was: The Anti-Matter Collision)" and it's known as "The Instant Army" for the remainder of the arc. I think this is by design given the flow of the story within the arc -- but we're faced with the first ever occasion of an arc name changing mid-stream. I've added a note at the beginning of the arc. Thoughts? I'm treating it as a one-off oddity for which no general policy is required.
I think you probably made a good call on that one. It's certainly something for us to watch for in new arcs now that we've seen it happen once, though. Perhaps we should consider categorizing missions using the first arc name identified from this point forward just to keep things as simple as possible.
I created the Warworks faction; it's pretty small but is used in several of Tina and Maria's missions. However, I noticed that in Tina's missions the mobs spell their faction "WarWorks" whereas I created "Warworks". Is there any way to do a redirect of WarWorks -> Warworks or vice versa? (Not sure if both spellings are used ingame, or if I made a mistake)
Apparently MediaWiki is one step ahead of us on this one. If you type "WarWorks" into the search box, it automatically resolves to "Warworks". However, it doesn't work the same way if you create a link to [[WarWorks]], so I went ahead and added a redirect to [[Warworks]].