I tried speed running the Defuse Practice of the Range to see how fast I'm able to beat it.
My current PB is 18s 12ms Using Raze and a Frenzy.
My Run: https://youtu.be/mYxaXy-KEY0
If anyone wants to try this for themselves, here's the Rules:
You must kill every Enemy (All 3)
Time starts on the frame the Buy-Menu Prompt disappears
Time Stops on the frame the Defuse Progress bar disappears