The closest thing ive come to anything is from Rattledagger's Walkthrough for Tortured Souls stickied here
QUOTE
NOTE: If joining Bodhi in Chapter 3, you must have Yoshimo in your party all the time from before choosing Bodhi till going for Spellhold, since otherwise he disappears and you can't do the main quest... But you can this way manage to have only Kachiko in your party - just remember to kill her before leaving for Spellhold, since otherwise you'll get stuck at the dock.
But
1: That means i have to drag Yoshimo along for as long as to spellhold. Nothing to do earlier?
2: I dont really understand what exactly it is i must do.
Kill Kachiko, then go to spellhold? Then what? Finish spellhold? Go to the 'main quest' ? finish it, come back and get Kachiko? Does yoshimo have to die in spellhold? Or be left in the 'main quest' or what?
Hopefully, thanks beforehand. So far im really enjoying TS