uhm, Lispen couldn't care less about Lidusis. He was pretending to protect him just to say near him because what he truly wants to protect is the "powers" inside Lidusis the rest of him is mere human shell. And why would he help him ? things are going exactly his way ! you do realize that Lidusis being in pain is due to Rood sucking the powers out of him since he awakened right ? so Lispen can't be happier now *evil laugh*
on a serious note, I hope Lidusis somehow manages to survive since I like him a lot but at the same time that would mean that Rood isn't awakened anymore => no more king powers. I don't want that either since things have just gotten exciting. ugh the struggle.