We have a documentation cleanup day coming up soon, and we've just got delete permissions so we can actually clean. We've been moving everything Analytics-infrastructure related to wikitech and that's where we'd prefer to see everything. The nuanced purpose of each wiki is great, but before we can get to that, we have to establish a trusted, complete, and discoverable source of documentation. Then we can start catering to the audiences of each wiki.
I propose we move everything to wikitech now, and establish a single page on meta and mediawiki that point to the different main pages on wikitech.