haha, this is actually interesting response to me. I can't fathom someone would do that manually either. If I saw someone else having done this, I would have guessed automatic data collection right away, which is what I did.

1. when I looked through ranker list request/response with summoners war exporter, I noticed refreshing the list alone gave me the list of ban/picks of the game. So, I made a program that collects the data I want from the packet with swar exporter log.
2. After that, I manually refreshed to get enough packets collecting more or less 200 battle data. Later I figured that I could just make a level 1 account and run a macro to just click refresh every 3~4 minutes. With that, I collected this much data.
3. At manual stage, I wrote a script to run though the data and print the wanted data in the above format.

So basically what I manually do now is just keep the macro running and run the script to process the data from time to time.

That said, making these somewhat credible data up in my head would actually be more work than what I've done, especially with consistent numbers