otjp: Tried the fight again, managed to get the auto rest after the fight down to 4 days 8 hours. That will do :)
Why not just equip a ring of regeneration just prior to defeating him?
I hate those auto-rest sequences too. I was going for a minimal rest playthrough, and having forced "rest until healed" events tacked on a lot of unwanted time. For me, the worst forced rests were at the end of Dragon Eye where you'll go through four area transitions in rapid succession and each triggers a 1 day rest.
IwubCheeze: The next area which MIGHT make your barb flinch a little will be one fight in the severed hand (and no, I'm not referring to Isair and Madae's final fight)
Indeed. Isair and Madae are easily-butchered pushovers by comparison to the guardian and that other nasty fight you're referring to in chapter 6. Actually, the two final bosses of the game are quite anti-climatic and an optimized party could probably defeat them when they're first encountered at the Wandering Village
way back in Chapter 3. It's really a point of gameplay/narrative dissonance given how weak they are compared to how powerful they are made out to be.