Redirecting request to different pools based on port number

You don't have to create multiple VIPs at all. With the iRule you have here, minus the port numbers, you can host all of the applications on a single IP and port. I should also point out that [HTTP::host] is only returning the host name and not the URI, so because the host name is the same for all of these, you can create a single VIP and modify your iRule to look something like this:

when HTTP_REQUEST {
     switch -glob [string tolower [HTTP::uri]] {
          "/tuesday*" { pool Stagin_Pool }
          "/wednesday*" { pool Management_Pool }
          "/thursday*" { pool Development_Pool }
          "/friday*" { pool Test_Lab_Pool }
          default { pool Production_Pool }
     }
}