Yoshimo need not die in Chapter 6
The trick consists in stoning Yoshimo somewhere outside CC and un-stoning him after returning from the Underdark. The question is whether it is worth it. Yoshimo will be awfully weak in Chapter 6 because he has lost all XP from the Asylum and the Underdark.
Therefore, do not hire Yoshimo at all [img]smile.gif[/img] Decline him to join in the Irenicus Dungeon. He is a temporary member of your party whom you will lose soon or who becomes a weak link in your party in the end. He is a pure XP eater.