Here's the edited CommonEvent.json file to make the fighting mini-game easier. Big thanks to Malen for providing which values need to be edited for it work. The edit file only works on the v.1.2 version of the game(I don't know if it'll work with patch that came out on 2025-august-22 on Ci-en) and I suggest to put it the game files just before you do the fighting game because I don't know how it affects other money collecting mini-game or the rest of the game.
For those who don't know, you download the archive file, extract it, put the extracted .json file in directory path ...\NTR_HUNTER_ver.1.2-Patched\data folder, click "Copy and Replace", then open the game and do the mini-game.