If you get hagglers mark early on, it completely skips 60-70% of the area you need to complete, so it's a must have for world records
Id place the merchant at a random spot instead right next to the boss room, to keep it from being too op.
This is from my experience, Ive gotten a 15 minute run while having 5 wins at the time and not being a good speed runner at all. Now, with 17 wins, I'm tryna speedrun and I get avg 23ish minutes without the mark.
(I'm using wand for speedrunning fight me)