Just an interesting note:

I did some estimations on time based upon the current IL boards (10 seconds lost at start - 11 seconds after each level - 2 seconds per intentional death).

Here is a comparison between ILs vs my Sum of Best vs the current WR.

End of Chapter 1 WR - 7:54 SoB - 7:33 IL Times - 7:03

End of Chapter 2 WR - 14:22 SoB - 13:49 IL Times - 12:54

End of Chapter 3 WR - 21:32 SoB - 20:30 IL Times - 18:44

End of Chapter 4 WR - 28:19 SoB - 26:55 IL Times - 24:34

Final Time WR - 37:25 SoB - 35:57 IL Times - 32:43

So the lowest current limit is 32:43 if you can do every level like an IL.