You must go to hell. Barr will drop it, but the probability is very low. The rarest thing is Mavina's real eye (headband). If you want to accumulate the whole set on a single machine, I'm afraid you can't do it in two or three years.
As this suit, gloves and belts are the easiest to take off. These two things are basically mass-produced by the old ink of hell, so you don't have to worry about them. Then the bow. Personally, I feel that the bow is relaxed from time to time. The easy place to come out is ACT5 violent skin, but the probability is still very small. Then there is the head ring. The hardest thing is that there is the greatest chance to raise a BUG KB Barr.