I spent like 4-5 hours to get this. For the longest time I almost thought it was bugged but it's not (at least on EU).
I got it in 0 hits but it probably works on below 5 too, but I only did the following in my 0 hits run.
You MUST finish the area "Hoverboard Testing Site", the achievement doesn't apply right after you finish the hoverboard section.
You have to get to the second layer of the map when the Dungeon Quest changes the current objective, map location: https://i.imgur.com/WNyKSZ2.png
I signed up just to comment because this achievement is terrible. You can die and use a Phoenix Plume without having to go back through the entire dungeon again.
Anyone have some sort of guide to assist with doing this achievement? Honestly feels next to impossible for me to do with the mouse control and potential lagspikes.
I tried looking for any safezones throughout the route to make it easier but I wasn't able to.