e4m6 is just horrific. Consider the gold key room. Lot's a spawns, no other monsters to kill them and you just with an axe. The final room is pretty grim too. And the water area. And...
I found a way to get all kills on e4m6. It seems like the best route to me, but I'm not entirely if a faster route is possible or not. I missed a spawn though, but you just need to get luckier than I did with the gold key area. It was recorded with a low hfr, as I was just testing the route, so I excuse any jerkiness that might appear in the demo
Anyways, here's the demo if anyone wants to have a stab at it:
This project will soon enter post-running production state unless somebody wants to improve some demo. Speak up soon if you have chopped demo plans! 8)