irule redirects

You might consider using a switch -glob evaluation. Example:

when HTTP_REQUEST {
    switch -glob [string tolower [HTTP::uri]] {
        "/page1/current/*" {
            HTTP::redirect "http://www.newdomain.com/site1/new/"
        }
        "/page2/current/*" {
            HTTP::redirect "http://www.newdomain.com/site2/new/"
        }
    }
}