it is quite simple if you remember how Jane operates and the idea of the show has been and is ...at least so far true to.

Jane tried to lure RJ out but going on his own and separating from the CBI in Vegas. He is betting that the actual RJ will miss his playful rival and reveal himself now that Jane is completely out of the picture. That is overly simplified but it is the idea of how Jane operates. McAllister could not have been RJ for so many reasons, such as he was not afraid of heights. Remember how secretively Jane is. Just like RJ. Go figure......