[Well. He certainly wasn't against just having Lanzhil killed, if a way to do it neatly with no way to link it back to himself arose -- say, if Yuuri's attacks on Large Shimaron army and navy had happened to kill Lanzhil. Boy, that would be been convenient. But Saralegui doubts Yuuri would be happy to hear that, so he just won't mention that part.]

He doesn't have to die. He just has to lose the throne. He was well on his way to it back home, at least at the point I remember. Word got out of what he had done to the other heirs, and the stress of the situation would likely have soon deposed him if the populace uprising didn't.