iRule to match 2 or more strings in the URI?

I would recommend you use a datagroup to store all of the possible values and then search against it.

when HTTP_REQUEST {
    if { [ class match [HTTP::uri] contains uri_Datagroup ] } {
        pool SERVER1
    } else {
        pool SOME_OTHER_POOL

Then create a datagroup (named uri_Datagroup in the above example) of type string and put all of your URIs in it.