How to get 1st place in the tournament with minimal effort

This worked for me, but it's not a 100% guarantee. First, when you have plenty of time, log in and check the current 1st place score in the tournament. Set your target score to be that score +100 points. It varies by league, but I usually aim for 130-180 first. If you get stuck in the middle, mix in some intentional losses (패작) to boost your tournament score. Then, the demoralized AIs (probably) will give up on catching up. If you only play seriously when you need to open a bag and get a new one, you can win even with under 300 trophies. It's also good to do some intentional losses in advance if you have the time. That way, you can quickly climb the ranks once the tournament starts the next day. This is how I've been consistently holding onto 1st place in the tournament.