You missed the point.
When you were urged to try different setups and from there determine which of them lost you the least number of cups overnight, it basically tells you that such defense team and formation may be your best.
Players have different heroes, heroes emblemed, troops and its levels, raiding style and raiding arena. I may have the heroes you dont have and vice versa. I may have my troops leveled to such degree while you don’t or vice versa. In the past, forum users and players can validly provide querying players the best set up for defense. Unfortunately, we don’t have the same heroes and troops. This is compounded more with the now fully implemented alternative raid defense formation. There are defensive heroes that don’t really shine on the classic defense formation but may shine in the new ones. One cannot really provide you a tailor cut defense team and the specific formation. Again, we don’t have the same heroes and troops, and possibly the same amount of emblems on the hero and the level of troops. Unless you are a whale where you have most, if not all, of the prized heroes fully emblemed and troops fully maxed. If such is the case, you only need to check the leader boards and check which of them have logged out for the longest time yet still managed to get to the top 50. He may have one of the most solid regular raid defense out there since he or she is able to maintain on top while offline.
Right now, a lot of players are still experimenting which would be their best defense, except those whales. When you were urged to experiment and determine which of the heroes on defense and the particular raid defense formation lets you lose the least amount of cup consistently overnight, that would be the best defense.
That was the idea. That was the point. And you missed it by a mile.