A program which simulates the oneshot endfight for 1.16.1 and assumes 20 ticks from end enter to dragon spawn, 7/8, 1/13, launch cancel and successful oneshot.
Download the latest release, run the .jar file, setup your conditions for the simulation, start the simulation, when it ends you will see a message that the data was written successfully, open the data generated by the program using google sheets, make a chart and style it as you like.
It is highly recommended to use jre/jdk 21 because other versions may or may not work for the program.
Finding the fastest endfight anyone can get using oneshot on a seed or a big list of seeds.
You can get it from here
If you have any questions, feedback, suggestions or need help with setting up the simulator, join the discord server.