Formation presets would be absolutely broken, there is no way someone breaks a garrison with 5 gold scorps infront and 12 spiders behind..
Right but liliths answer is to put 12 spiders in front and 5 scorps behind due to stupid game logic lol. This is equally as ridiculously easy to kill. With how powerful level 50 heros are, a perfect lich defense can probably be broken atm, but nobody attacks on 17-33 so i cant say that I have seen one in a while.
I think a maxed level garrison should be costly but not impossible for a maxed level attacker to break. The first wave of all gold defense should fall, but cause (making this up) roughly 35% -50% hospital rate to the attacking army. The second or third attack on pure golds w/ research should eventually break the attacker. Obviously these numbers are arbitrary, but i don't think that a maxed out attacker should be able to clear a maxed wall for free, or not be able to clear it at all. There should be a middle ground. butttt we have decided to reduce hospital rates to virtually nothing, so now rush and the house skill easily let an attacker pummel a wall back to back to back until it breaks and they get the resources to replace their 5 dead swordsman.
Regardless, it now seems like the game is just a pve grinder where we trade cities and nobody really attacks. The one guy that does attack gets zeroed within a few minutes and quits.