Yeah fuck TOTG Ember room. I've lost some serious shit there. What in the world is this about? Merchant build? What does that even mean?He's on a path that runs behind where you come down the ramp but he can aggro you as you are coming down so as you're moving forward he'll just come running up behind to blam your innards.
Also, If you take a few steps after the white fog door in ToTG, you can hear that motherfucker running for you. You can wait for him to come to you and not have to worry about aggroing other enemies.