Ok, so it's all in act 4 then.
Overall Hui mode has a chance to be decent, but it needs these things to become reality:
1. Lower health of mobs drastically - X times of current (x between 5 and 10).
2. Smaller maps - no need to find every item while you hacking your way to the object.
3. Buff up char resistances back to 75+, more tankable bosses.
4. Enable runewords in all items.