The only issue was that it took much time to lure skeletons away, making farming there boring. If you die multiple times and cry on the Forum that you have no gold anymore, it‘s your own fault for lacking the understanding of luring tactics. Of course trap rat had issues with that place but with the egg you can lay right next to the totems, it‘s rather easy. Thornwall has been shit for ages since it has nd. That‘s removed in sigma, too.
Honestly, most people just rushed to the bottom right corner for that charm since that one never was protected by a shield. It‘s way faster if you just want the charm.