This is all a very interesting discussion. But, doesn't Koringgus basically show us that the Absolute is false?
No, he realizes that the Dûnyain conception of the Absolute, as being a passive concept waiting to be reached is wrong. The Absolute already exists and already judges/shows judgement. Meanwhile, the worldborn are wrong in thinking that it has a human personality. What Koringhus thinks seems largely in conjuction with Kellhus's description of God of Gods to Proyas, so I think we can assume that, with both Dûnyain having reached the same conclusion through different paths, it's bound to be true.
Koringhus also realizes something both Moenghus and Kellhus already knew - that the brethren are not immune to the Legion Within. That's why he saved the defective, because it was his son, because he had a natural urge to save his own son. I think his "senseless" jump is largely in relation to this - he fully gives up on the Dûnyain Shortest Path, and surrenders to his urges, which push him towards the Absolute, in death.
Also, on the subject of Narindar, I don't quite see how the vessel of Ajokli could be self-moving, seeing that Ajokli moves him; or how the observer effect changes his routines. I am not quite convinced that the self-moving soul, the Absolute, could be physical at all - after all, the meat of the world is still subject to the Dûnyain principles of cause and effect.