To the second one, yeah, it applies. With Sabine, any allies at all will trigger the temper. Zurvash can get away with animals, but that's it.
As to the first one, I've... actually forgotten what exactly the condition is. I want to say it's a relation between character level and the depth you're resting at, but that may be (is likely) inaccurate. Could also be something related to amount of times rested per level (dungeon or character, unsure)... or something else entirely, ha. There was a full religion spoiler (code snippit, actually, iirc) running around one of the groups at some point... not sure if it's still around.
Somewhat unrelated, but you might enjoy giving a Zurvash version of that build a run. Pain/passion/<other> cleric up to level 3, then full in into barbarian. The built in vampirism effect (1 hp per 10 damage dealt to other things) and fatigue regen after level 3 is pretty sexy, heh.