Played on June 18th 2023 using AmigaLive.
This run was made possible by MegaKEK's routing and help. Turns out my original route was good but needed just a couple of tweaks and new tricks to make it even faster.
Planned out the route with minimal ammo and because of it I had to figure out a way to despawn enemies fast to have enough bullets. Had to start with using MegaKEK's clip trick: I shot four bullets at the first two solo enemies to get a full clip in the gun in addition to the maximum 9 on me.
Hardest part was doing a very specific sequence of moves on floor 6 (when the clock hits 23:41:08) in order to turn a 6-enemy fight into a 3-enemy fight. You also have to use ammo very sparingly on the fights on floor 16 and 19 to make it through with just five clips.
Saved some extra time by using a new trick where I plant the explosives when going past the bomb door the minimize turns.
Did everything near perfect and could have closed it at 9:48 but accidentally first pressed space instead of up in front of the bomb door and missed it by one second. It was a new trick for me so was a bit confused and nervous still. I don't usually make it there that fast even with save states so I think this is it for me unless a faster route is found.