I figured that with so many missions to take on, & keeping track on every last one of them, I said to myself, "Who's keeping track of the total amount of missions the game has right now?", & after quick thinking, I decided to add in a "Current Mission Total" section in the Wiki's page about Missions. I added the "???" to it, because, I don't know how many missions the game has right now, not counting the Arcade expeditions because they're merely objectiveless runs of the Clockwork Stratums themselves. The "???" is only temporary until someone gives the accurate total estimate.
Anyway, I hope you don't mind I added that in.
It's very good data to have, but definitely not in its own section because there is not enough data to warrant its own section. It needs to be worded differently. Mentioning the arcade is redundant and potentially confusing. What I'm going to do is something similar to this:
"There are currently X rank missions, X prestige missions (including X event prestige missions), and 1 expansion mission, coming to a total of X missions."
EDIT: done with data. Debating changing the organization so notes and notes-history are above the "list", as we do for sortable list pages elsewhere on the wiki, but I don't think this is necessary, as the page reads well as it is, and the "list" only consists of 4 complex entities.