  The aforementioned Rings that show past, present, and Future uses T'A'R (as demonstrated by its interaction with Egwene's Ring) for all three presentations.  Egwene's Twisted Ring puts a sleeper into T'A'R but never put anyone into a Mirror World or forces an imbalanced link with anyone.  The Bowl of the Winds Controls all of the many factors involved in the weather, but I'd be very surprised if it could be used to Visit Mirror Worlds or the *Finn or if it could be used to generate Balefire.