- You can accomplish "latest wiki's" using a custom recent activity block that only shows wiki pages.
- VaultWiki does not track views by time. The closest we could accomplish is: of pages that have edits within the last X days, the pages with the most views of those edits. If this is acceptable, I can work on such a block. However, I cannot imagine a way that the block would not be slooow.
- There is no system in place to determine whether a forum thread is related to a wiki page automatically. The wiki's Similar Content block is not bidirectional. I would recommend starting a new request for bidirectional Similar Content block, so that non-wiki content can be used as the scope to get a list of wiki content. The Related Wikis block we had planned is only wiki pages that are related to other wiki pages, because there is sufficient data (such as categories) which makes that possible.