This may seems a bit rough but if you're going to get all the other achievement you may consider doing more than one playthrough the second is for the new game plus achievement. The more you play with plague knight the more you get to know how he's moving with the double jump and the bomb jump. It makes it easy to skip through various rooms in every stages. I did it myself trying not to die and whenever it happens I just quit to main menu that way it won't save my time rather than if I chose to return to world map. I was thinking that I couldn't do it and at the very end I finished 1:05 and I saved a lot of time like not going into town, not buying any material upgrade (arcana and stuff). In the end this achievement is not that hard at all it just takes a little practice that's all.